Know the difference between principles based on right or wrong vs. principles based on personal gain, and consider the basis of your own principles.

Know the function of a fuse box and the appearance of a tripped circuit breaker.

Capital punishment is the source of many an argument, both good and bad.

The difference between talking on your cell phone while driving and speaking with a passenger is huge. The person on the other end of the cell phone is chattering away, oblivious.

Know how to behave at a buffet. Take a clean plate for a second helping.

There's plenty of intelligence in the world, but the courage to do things differently is in short supply.

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.