It may not affect the validity of the argument, but it may suggest something about the motivations of the person making the argument.

Each person's idea of where something sits on the spectrum of right and wrong differs.

If someone is being hypocritical, it can lead people to question the motive behind the words.

This is considerably better than the way I put it! Thanks!

andy_ppp was not trying to invalidate what Tim Cook was saying but just remind everyone that the motivations here may be less than altruistic

I think you are right but then I was never saying anything about the points, I was saying personally I’d find it difficult to make statements in direct contradiction to my actions. Which wasn’t clear and logical fallacies are definitely worth consideration! Maybe you have show a little bit of cognitive bias assuming I was trying to undermine the points he makes.

>>I think you are right but then I was never saying anything about the points

I think perhaps you should. It would improve the quality of the discussion.

http://www.paulgraham.com/disagree.html