People who work crossword puzzles know that if they stop making progress, they should put the puzzle down for a while.

Be able to recognize when you're reading or hearing material biased to your own side.

Yes. The original argument is defective. Substitute the word 'male' for 'gay,' and you'll see the flaw: 'Male people cannot be normal. If everyone were male starting tomorrow, the human race would die out, so being male cannot be nature's intended way.' Or you could substitute the word 'female.' In either case, the argument makes no sense: Being male or female is perfectly normal.

Revenge feels right only to those directly involved. Justice feels right even to outsiders.

Think of a hypothesis as a card. A theory is a house made of hypotheses.

If your head tells you one thing, and your heart tells you another, before you do anything, you should first decide whether you have a better head or a better heart.

Teens think listening to music helps them concentrate. It doesn't. It relieves them of the boredom that concentration on homework induces.