I have just finished watching Ip Man 2. It is a great action movie. The plot is thinnner than rice paper, but it's a great action movie.
English boxer Twister disparages Chinese martial artists as dancers rather than fighters, and scornfully challenges them to duels. Master Hung accepts the challenge. Twister beats Master Hung to a pulp. Master Hung refuses to surrender, saying that he cannot allow Chinese martial arts be insulted. The fight continues -- until Master Hung dies in the boxing ring.
After the funeral, Master Ip challenges Twister. He beats Twister to a pulp. At the post-fight interview, Master Ip says: "I did not fight Twister to prove that Chinese martial arts are superior to Western boxing. I did it to prove that even though people are not equal in social status, we are equal in deserving of respect." These philosophical words were greeted with a standing ovation -- by both Chinese and English members of the audience.
I have questions.
Master Hung fights to protest the insult to Chinese martial arts. Look around the world today. Many use violence to protest what they perceive as insults to them. The rest of the world calls the violent protesters names, which are seen as further insults, to be replied to with more violence. Is violence the correct answer to insults?
Master Ip said his philosophical words after he had beaten Twister to a pulp. Suppose Twister had beaten Master Ip to a pulp, or even killed him the way he had earlier killed Master Hung. I doubt then that the same philosophical words would have evoked the same emotional response, the same moral approval. It appears that the outcome of the fight is relevant to the truth of those words. Can this be?
People do generally say that respect is not freely given, but must be earned and deserved. One does not respect those not deserving of it. This directly contradicts the claim that all people are equal in deserving of respect. (Social status is irrelevant to this consideration.) Are Master Ip's philosophical words, emotionally evocative as they were in the given context, upon cold examination after all not true?
Enjoy the movie -- then think about it.
Friday 30 April 2010
Philosophy cafe interrupted?
When I went to Nook on 21 April (third Wed of the month), I found it closed. There was a blackboard notice saying it is closed for normal business but available for special bookings. My apologies to anyone who went there and found it closed.
I do not know if the situation is temporary or permanent. I shall find out and update readers accordingly.
I have been running this philosophy cafe since October 2003. Some participants have suggested I conduct it at a more convenient venue. I have so far resisted the suggestion. I had two reasons. The relatively isolated and quiet venue of Nook is more conducive for philosophical discussion. More importantly, I was not confident I had found the right format for my philosophy cafe sessions. Now, after trying many formats over the past six years, I am at last confident of my format. So perhaps it is time to expand.
Philosophy cafe is not a fixed place. It is a concept and an event. Therefore, it is portable. If anyone knows of a suitable place, please let me know. If anyone has a group which would like to experience philosophising, please let me know. I can be contacted via comments on this blog, or through my email (link is on the left margin of this blog).
Please visit this blog again for updates on philosophy cafe sessions -- and other interesting posts.
I do not know if the situation is temporary or permanent. I shall find out and update readers accordingly.
I have been running this philosophy cafe since October 2003. Some participants have suggested I conduct it at a more convenient venue. I have so far resisted the suggestion. I had two reasons. The relatively isolated and quiet venue of Nook is more conducive for philosophical discussion. More importantly, I was not confident I had found the right format for my philosophy cafe sessions. Now, after trying many formats over the past six years, I am at last confident of my format. So perhaps it is time to expand.
Philosophy cafe is not a fixed place. It is a concept and an event. Therefore, it is portable. If anyone knows of a suitable place, please let me know. If anyone has a group which would like to experience philosophising, please let me know. I can be contacted via comments on this blog, or through my email (link is on the left margin of this blog).
Please visit this blog again for updates on philosophy cafe sessions -- and other interesting posts.
Tuesday 27 April 2010
Does the Internet worsen polarisation?
Headline: Mad Max public square on the Internet
Writer: David Brooks
Source: The Straits Times, 21/4/10
Quote1
In 2001, Mr Cass R. Sunstein, ... a professor at the University of Chicago, ... raised the possibility that the Internet may be harming the public square.
Comment1
The conclusion is "the Internet harms the public square". What is the argument?
Quote2
In the mid-20th century, Americans got most of their news through a few big networks and mass-market magazines. People were forced to encounter political viewpoints different from their own. ... Mr Sunstein wondered whether the Internet was undermining all this. The new media, he noted, allow you to personalise your newspapers so you see only the stories that already interest you. You can visit only those websites tht confirm your prejudices. Instead of a public square, we could end up with a collection of information cocoons.
Comment2
We are told there is a change from "force-fed information" to "self-selected information" -- and that this can lead to "information cocoons". Here is the argument, formally presented:
P1: If (self-selected information), then (information cocoons)
P2: (self-selected information)
C1: Hence, (information cocoons)
The argument has the valid Modus Ponens (If P then Q / P / Hence, Q) argument form. P2 is true, as a matter of general knowledge. Is P1 also true?
Quote3
Mr Sunstein ... has done ... work ... about our cognitive biases. We like hearing evidence that confirms our suppositions. We filter out evidence that challenges them. We have a ntural tilt towards polarised views. People are prone to gather in like-minded groups.
Comment3
Right. Here is the link that supports P1.
P3: If (self-selected information), then (similar information) [cognitive bias]
P4: If (similar information), then (information cocoons)
C2: Hence, if (self-selected information), then (information cocoons)
C2 = P1
This has the valid Hypothetical Syllogism (If P then Q / If Q then R // Hence, If P then R) argument form. P3 is what Sunstein has found in his work on cognitive bias. P4 is true by definition. The argument is sound. P1 is true.
We return to the argument in Comment2. The argument form is valid. P2 is true. Now, P1 is also true. The argument (P1 / P2 // hence C1) is sound. Therefore, C1 is true -- we will develop information cocoons.
Quote4
Once in them (like-minded groups), they (people) drive one another to even greater extremes. ... Mr Sunstein's fear was that the Internet might lead to a more ghettoised, polarised and insular electorate.
Comment4
Thus, information cocoons in turn lead to greater polarisation:
If (information cocoons), then (greater polarisation)
Quote5
Yet new research complicates this picture. Mr Matthew Gentzkow and Mr Jesse Shapiro, both of the Unviersity Chicago Booth School of Business, have measured ideological segregation on the Internet. ... But the core finding is that most Internet users do not stay within their communities. Most people spend a lot of time on a few giant sites with politically integrated audiences, like Yahoo! News. But even when they leave these integrated sites, they often go into areas where most visitors are not like themselves. ...
Comment5
This is not a complication. This is a direct refutation of P3. This says that when people self-select information, they do not go for similar information. It says P3 is false. This makes argument (P3 / P4 // hence, C2 = P1) unsound. P1 is not proven true. Hence, argument (P1 / P2 // hence, C1) fails.
Quote6
This does not mean they are not polarised.
Comment6
This quote relates to argument (P3 / P4 // hence C2) in Comment3. The word "this" in Quote6 refers to the denial of:
P3: If (self-selected information), then (similar information)
This denial does not lead to a denial of (information cocoons) and hence polarisation.
Here is the whole argument.
P3: If (self-selected information), then (similar information)
P4: If (similar information), then (information cocoons)
P2: (self-selected information)
C1: Hence, (information cocoons)
P5: (information cocoons) [from C1]
P6: If (information cocoons), then (greater polarisation) [from Comment4]
C3: Hence, (greater polarisation)
We deny P3. To go from (not-P3) to (not-C3) will commit the Fallacy of Denying the Antecedent (If P then Q / not-P // hence, not-Q). So we cannot deny (greater polarisation). At the same time, we also cannot assert (greater polarisation), since we denied P3 in Comment3. Result: We do not know about polarisation.
Quote7
Looking at a site says nothing about how you process it or the character of attention you bring to it. It could be people spend a lot of time at their home sites and then go off on forays looking for things to hate. ...
Comment7
This illustrates why Denying the Antecedent is a fallacy. Denying one cause of a phenomenon does not preclude other causes of the same phenomenon.
Quote8
The study also suggests that if there is increased polarisation (and there is), it is probably not the Internet that is causing it.
Comment8
We have not been presented with any argument supporting the claim that there is increased polarisation. This is just the writer's assertion.
From Quote6 and Comment6, we saw that people not visiting confirmatory sites does not lead to any firm conclusion about polarisation. In Quote7, the writer says people could "go off on forays looking for things to hate".
Given these, I do not see how we can arrive at the conclusion that "it is probably not the Internet that is causing it [increased polarisation]."
END
Writer: David Brooks
Source: The Straits Times, 21/4/10
Quote1
In 2001, Mr Cass R. Sunstein, ... a professor at the University of Chicago, ... raised the possibility that the Internet may be harming the public square.
Comment1
The conclusion is "the Internet harms the public square". What is the argument?
Quote2
In the mid-20th century, Americans got most of their news through a few big networks and mass-market magazines. People were forced to encounter political viewpoints different from their own. ... Mr Sunstein wondered whether the Internet was undermining all this. The new media, he noted, allow you to personalise your newspapers so you see only the stories that already interest you. You can visit only those websites tht confirm your prejudices. Instead of a public square, we could end up with a collection of information cocoons.
Comment2
We are told there is a change from "force-fed information" to "self-selected information" -- and that this can lead to "information cocoons". Here is the argument, formally presented:
P1: If (self-selected information), then (information cocoons)
P2: (self-selected information)
C1: Hence, (information cocoons)
The argument has the valid Modus Ponens (If P then Q / P / Hence, Q) argument form. P2 is true, as a matter of general knowledge. Is P1 also true?
Quote3
Mr Sunstein ... has done ... work ... about our cognitive biases. We like hearing evidence that confirms our suppositions. We filter out evidence that challenges them. We have a ntural tilt towards polarised views. People are prone to gather in like-minded groups.
Comment3
Right. Here is the link that supports P1.
P3: If (self-selected information), then (similar information) [cognitive bias]
P4: If (similar information), then (information cocoons)
C2: Hence, if (self-selected information), then (information cocoons)
C2 = P1
This has the valid Hypothetical Syllogism (If P then Q / If Q then R // Hence, If P then R) argument form. P3 is what Sunstein has found in his work on cognitive bias. P4 is true by definition. The argument is sound. P1 is true.
We return to the argument in Comment2. The argument form is valid. P2 is true. Now, P1 is also true. The argument (P1 / P2 // hence C1) is sound. Therefore, C1 is true -- we will develop information cocoons.
Quote4
Once in them (like-minded groups), they (people) drive one another to even greater extremes. ... Mr Sunstein's fear was that the Internet might lead to a more ghettoised, polarised and insular electorate.
Comment4
Thus, information cocoons in turn lead to greater polarisation:
If (information cocoons), then (greater polarisation)
Quote5
Yet new research complicates this picture. Mr Matthew Gentzkow and Mr Jesse Shapiro, both of the Unviersity Chicago Booth School of Business, have measured ideological segregation on the Internet. ... But the core finding is that most Internet users do not stay within their communities. Most people spend a lot of time on a few giant sites with politically integrated audiences, like Yahoo! News. But even when they leave these integrated sites, they often go into areas where most visitors are not like themselves. ...
Comment5
This is not a complication. This is a direct refutation of P3. This says that when people self-select information, they do not go for similar information. It says P3 is false. This makes argument (P3 / P4 // hence, C2 = P1) unsound. P1 is not proven true. Hence, argument (P1 / P2 // hence, C1) fails.
Quote6
This does not mean they are not polarised.
Comment6
This quote relates to argument (P3 / P4 // hence C2) in Comment3. The word "this" in Quote6 refers to the denial of:
P3: If (self-selected information), then (similar information)
This denial does not lead to a denial of (information cocoons) and hence polarisation.
Here is the whole argument.
P3: If (self-selected information), then (similar information)
P4: If (similar information), then (information cocoons)
P2: (self-selected information)
C1: Hence, (information cocoons)
P5: (information cocoons) [from C1]
P6: If (information cocoons), then (greater polarisation) [from Comment4]
C3: Hence, (greater polarisation)
We deny P3. To go from (not-P3) to (not-C3) will commit the Fallacy of Denying the Antecedent (If P then Q / not-P // hence, not-Q). So we cannot deny (greater polarisation). At the same time, we also cannot assert (greater polarisation), since we denied P3 in Comment3. Result: We do not know about polarisation.
Quote7
Looking at a site says nothing about how you process it or the character of attention you bring to it. It could be people spend a lot of time at their home sites and then go off on forays looking for things to hate. ...
Comment7
This illustrates why Denying the Antecedent is a fallacy. Denying one cause of a phenomenon does not preclude other causes of the same phenomenon.
Quote8
The study also suggests that if there is increased polarisation (and there is), it is probably not the Internet that is causing it.
Comment8
We have not been presented with any argument supporting the claim that there is increased polarisation. This is just the writer's assertion.
From Quote6 and Comment6, we saw that people not visiting confirmatory sites does not lead to any firm conclusion about polarisation. In Quote7, the writer says people could "go off on forays looking for things to hate".
Given these, I do not see how we can arrive at the conclusion that "it is probably not the Internet that is causing it [increased polarisation]."
END
Is Obama serious about Mars?
US President Obama has announced his space programme of a manned trip to Mars. Writer Gwynne Dyer is sceptical. We examine the arguments.
Headline: Obama's Martian odyssey more a charade?
Source: The Straits Times, 22/4/10
Writer: Gwynne Dyer
Quote1
In the real world, the United States is giving up on space, although it is trying hard to conceal its retreat.
Comment1
As in most essays, the conclusion is placed right up front. What is the argument for this conclusion?
Quote2
Last week, three Americans with a very special status -- they have all commanded missions to the Moon -- made their dismay public. In an open letter, Mr Neil Armstrong, the first human being to walk on the Moon, Mr Jim Lovell, commander of Apollo 13, and Mr Eugene Cernan, commander of Apollo 17, condemned President Barack Obama's plans for the National Aeronautics and Space Administration (Nasa) as the beginning of a "long downhill slide to mediocrity" for the US.
Comment2
These three persons are offered as authorities. They are astronauts, occupying a special niche in the US space programme. That does not give them an overview of the programme. This is a case of Argumentum ad Verecundiam -- appeal to false authority.
Quote3
The letter was timed to coincide with Mr Obama's visit to Cape Canaveral to defend his new policy, which abandons the goal of returning to the Moon by 2020, or indeed ever.
Comment3
If the new policy explicitly "abandons the goal of returning to the Moon by 2020", then the case is made that the US has given up on the Moon -- but not necessarily also the rest of space.
Quote4
Mr Obama insists that this sacrifice will allow the US to pursue a more ambitious goal, but his plan to send Americans to Mars by the late 2030s has the distinct political advantage of not needing really heavy investment while he is still in office -- even if he wins a second term. ...
Comment4
It is implied that the "political advantage" is the aim of the new policy. No proof is offered that this is so. It remains logically open for the "political advantage" to be just a byproduct of the new policy, and not its sinister aim.
Quote5
Those are indeed ambitious goals, and they would require heavy-lift rockets that do not yet exist. But the "vigorous new technology development" programme that might lead to those rockets will get only US$600m annually (the price of four F22 fighters) for the next five years, and actual work on building such rockets would probably not begin until 2015. ...
Comment5
At last we have an argument for the conclusion "give up on space" (GUOS). Here it is, formally presented:
P1: If (US$600m a year & work starts 2015), then (GUOS)
P2: (US$600m a year & work starts 2015)
C1: Hence, (GUOS)
This argument form is the valid Modus Ponens (If P then Q/P//hence Q). We take P2 as an empirically true fact. However, P1 is not intuitively true -- starting work in 2015 suggests a resumption of space exploration, not "giving up on space".
Quote6
[Meanwhile, the US] will essentially be a hitch-hiker on other countries' space programmes. Mr Obama suggests that this embarrassment will be avoided because private enterprise will come up with cheap and efficient "space taxis". ...
Comment6
The notion of "space taxis" changes the argument presented in Comment5:
P3: If (US$600m a year & work starts 2015 & space taxis), then (not-GUOS)
P4: (US$600m a year & work starts 2015 & space taxis)
C2: Hence, (not-GUOS)
This is a valid Modus Ponens. If P3 and P4 are true, then the conclusion must follow.
Quote7
No doubt they will get various vehicles up there. But if they can build something by 2020 that can lift as much as the ancient Shuttles into a comparable orbit, let along something bigger that can go higher, I will eat my hat. Space technology eats up capital almost as fast as weapons technology, and these entrepreneurs have no more than tens of billions at most.
Comment7
The "eat my hat" remark is a rhetorical device that rides on the valid Modus Tollens (If P then Q/not-Q//hence, not-P) argument form:
P5: If (lift Shuttles), then (eat hat)
P6: Not-(eat hat) [because impossible]
C3: Hence, not-(lift Shuttles)
Now for the real argument:
P7: If (lift Shuttles), then (cost more than tens of billions)
P8: Not-(cost more than tens of billions) [entrepreneurs don't have such wealth]
C4: Hence, not-(lift Shuttles)
Remember that (lift Shuttles) refers to the capacity of the "space taxis". So:
not-(lift Shuttles) = not-(space taxis)
This denies the truth of P4 in Comment6. The conclusion (not-GUOS) then cannot follow. GUOS remains possible.
Quote8
Does Mr Obama know this? Very probably, yes.
Comment8
The word "this" refers to "space taxis are not possible". This returns us to the argument in Comment5, which I reproduce here:
P1: If (US$600m a year & work starts 2015), then (GUOS)
P2: (US$600m a year & work starts 2015)
C1: Hence, (GUOS)
This argument goes only so far as to conclude GUOS. But there is a further claim (see Quote1) of "trying hard to conceal its retreat". No argument has yet been put forward to support this further claim.
Quote9
One suspects that he [Mr Obama] would actually be cutting Nasa's budget, not very slightly raising it, if its centre of gravity (and employment) were not in the swing state of Florida, where he cannot afford to lose any votes.
Comment9
Here is a hinted (it is not explicitly stated) argument for "trying hard to conceal its retreat". Here is a reasonable construction:
P9: If (tell truth), then (lose Florida votes)
P10: If (lose Florida votes), then (lose US elections) [because Florida is a swing state]
P11: Not-(lose US elections)
C5: Hence, not-(tell truth)
This is a Hypothetical Syllogism (If P then Q / If Q then R / Hence, If P then R) combined with a Modus Tollens. It is a valid argument form. The three premisses can be taken to be true. The argument is sound. We have a case for "trying hard to conceal its retreat".
Quote10
What is going on here is a charade.
Comment10
So we arrive at the final conclusion. The Martian odyssey programme is a charade.
That there is no real odyssey is argued for in Comment5, and repeated in Comment8. That there is a false front being put up is argued for in Comment9. The Martian odyssey programme is a charade.
END
Headline: Obama's Martian odyssey more a charade?
Source: The Straits Times, 22/4/10
Writer: Gwynne Dyer
Quote1
In the real world, the United States is giving up on space, although it is trying hard to conceal its retreat.
Comment1
As in most essays, the conclusion is placed right up front. What is the argument for this conclusion?
Quote2
Last week, three Americans with a very special status -- they have all commanded missions to the Moon -- made their dismay public. In an open letter, Mr Neil Armstrong, the first human being to walk on the Moon, Mr Jim Lovell, commander of Apollo 13, and Mr Eugene Cernan, commander of Apollo 17, condemned President Barack Obama's plans for the National Aeronautics and Space Administration (Nasa) as the beginning of a "long downhill slide to mediocrity" for the US.
Comment2
These three persons are offered as authorities. They are astronauts, occupying a special niche in the US space programme. That does not give them an overview of the programme. This is a case of Argumentum ad Verecundiam -- appeal to false authority.
Quote3
The letter was timed to coincide with Mr Obama's visit to Cape Canaveral to defend his new policy, which abandons the goal of returning to the Moon by 2020, or indeed ever.
Comment3
If the new policy explicitly "abandons the goal of returning to the Moon by 2020", then the case is made that the US has given up on the Moon -- but not necessarily also the rest of space.
Quote4
Mr Obama insists that this sacrifice will allow the US to pursue a more ambitious goal, but his plan to send Americans to Mars by the late 2030s has the distinct political advantage of not needing really heavy investment while he is still in office -- even if he wins a second term. ...
Comment4
It is implied that the "political advantage" is the aim of the new policy. No proof is offered that this is so. It remains logically open for the "political advantage" to be just a byproduct of the new policy, and not its sinister aim.
Quote5
Those are indeed ambitious goals, and they would require heavy-lift rockets that do not yet exist. But the "vigorous new technology development" programme that might lead to those rockets will get only US$600m annually (the price of four F22 fighters) for the next five years, and actual work on building such rockets would probably not begin until 2015. ...
Comment5
At last we have an argument for the conclusion "give up on space" (GUOS). Here it is, formally presented:
P1: If (US$600m a year & work starts 2015), then (GUOS)
P2: (US$600m a year & work starts 2015)
C1: Hence, (GUOS)
This argument form is the valid Modus Ponens (If P then Q/P//hence Q). We take P2 as an empirically true fact. However, P1 is not intuitively true -- starting work in 2015 suggests a resumption of space exploration, not "giving up on space".
Quote6
[Meanwhile, the US] will essentially be a hitch-hiker on other countries' space programmes. Mr Obama suggests that this embarrassment will be avoided because private enterprise will come up with cheap and efficient "space taxis". ...
Comment6
The notion of "space taxis" changes the argument presented in Comment5:
P3: If (US$600m a year & work starts 2015 & space taxis), then (not-GUOS)
P4: (US$600m a year & work starts 2015 & space taxis)
C2: Hence, (not-GUOS)
This is a valid Modus Ponens. If P3 and P4 are true, then the conclusion must follow.
Quote7
No doubt they will get various vehicles up there. But if they can build something by 2020 that can lift as much as the ancient Shuttles into a comparable orbit, let along something bigger that can go higher, I will eat my hat. Space technology eats up capital almost as fast as weapons technology, and these entrepreneurs have no more than tens of billions at most.
Comment7
The "eat my hat" remark is a rhetorical device that rides on the valid Modus Tollens (If P then Q/not-Q//hence, not-P) argument form:
P5: If (lift Shuttles), then (eat hat)
P6: Not-(eat hat) [because impossible]
C3: Hence, not-(lift Shuttles)
Now for the real argument:
P7: If (lift Shuttles), then (cost more than tens of billions)
P8: Not-(cost more than tens of billions) [entrepreneurs don't have such wealth]
C4: Hence, not-(lift Shuttles)
Remember that (lift Shuttles) refers to the capacity of the "space taxis". So:
not-(lift Shuttles) = not-(space taxis)
This denies the truth of P4 in Comment6. The conclusion (not-GUOS) then cannot follow. GUOS remains possible.
Quote8
Does Mr Obama know this? Very probably, yes.
Comment8
The word "this" refers to "space taxis are not possible". This returns us to the argument in Comment5, which I reproduce here:
P1: If (US$600m a year & work starts 2015), then (GUOS)
P2: (US$600m a year & work starts 2015)
C1: Hence, (GUOS)
This argument goes only so far as to conclude GUOS. But there is a further claim (see Quote1) of "trying hard to conceal its retreat". No argument has yet been put forward to support this further claim.
Quote9
One suspects that he [Mr Obama] would actually be cutting Nasa's budget, not very slightly raising it, if its centre of gravity (and employment) were not in the swing state of Florida, where he cannot afford to lose any votes.
Comment9
Here is a hinted (it is not explicitly stated) argument for "trying hard to conceal its retreat". Here is a reasonable construction:
P9: If (tell truth), then (lose Florida votes)
P10: If (lose Florida votes), then (lose US elections) [because Florida is a swing state]
P11: Not-(lose US elections)
C5: Hence, not-(tell truth)
This is a Hypothetical Syllogism (If P then Q / If Q then R / Hence, If P then R) combined with a Modus Tollens. It is a valid argument form. The three premisses can be taken to be true. The argument is sound. We have a case for "trying hard to conceal its retreat".
Quote10
What is going on here is a charade.
Comment10
So we arrive at the final conclusion. The Martian odyssey programme is a charade.
That there is no real odyssey is argued for in Comment5, and repeated in Comment8. That there is a false front being put up is argued for in Comment9. The Martian odyssey programme is a charade.
END
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