Know how to treat frostbite until you can get indoors.

Know how to travel from your town to a nearby town without a car, either by bus or by rail.

Be able to correctly pronounce the words you would like to speak and have excellent spoken grammar.

Scientists and creationists are always at odds, of course.

Know how to behave at a fine restaurant, which is a telltale measure of social maturity.

Have enough sense to know, ahead of time, when your skills will not extend to wallpapering.

Be able to draw an illustration as least well enough to get your point across to another person.