A helpful sanity check and all-around healthy exercise is to be unexpectedly put in a situation that challenges your beliefs, or at least makes you question them. For example, once or twice per year I find myself in a situation where I'm forced to rethink my reasons for giving up meat. The situation usually goes something like this: I'm at a restaurant by myself, I ordered what I thought was a meat-free dish, but when it arrives — lo and behold — 'tis not what I expected. Sometimes it's my fault, like when I neglected to fully read the menu, and I casually assumed there would be no meat in the "vegetable soup". Sometimes the restaurant staff simply goofs up the order. But whatever the cause, I am now faced with a minor moral dilemma: sending back the dish might actually be worse than just eating it.