Understand why casinos and racetracks stay in business - the gambler always loses over the long term.

Know which officials are voted into office and which are appointed, and by whom.

The magnitude of an action may change not only the strength of its impact, but the direction. If you became a dentist, for example, you would certainly be an asset to our society. But what if everyone became a dentist? Who would bake the bread? Who would build the houses?

Skill is successfully walking a tightrope between the twin towers of New York's World Trade Center. Intelligence is not trying.

How can we live in freedom and maintain that we are entitled to *anything* that we can't get without the labor of others? Remember, if we are entitled to the labor of others, that makes slaves of those others.

Attention-deficit disorders seem to abound in modern society, and we don't know the cause.

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.