(For other posts in this series, see here.)
Philosopher and advocate of animal rights Peter Singer is sometimes accused of going out of his way to make deliberately outrageous statements. From what I have read of him, this charge seems unjust. He strikes me as a very thoughtful philosopher who is not being merely a provocateur but is skillfully using the argument from marginal cases to show us the consequences of carrying the often glib justifications we use to justify our treatment of animals to their logical conclusion. The end result often makes us uncomfortable, which may explain the somewhat heated responses he generates.