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

Be able to confide your innermost secrets to your mother and your innermost fears to your father.

Be able to defend your arguments in a rational way. Otherwise, all you have is an opinion.

Be able to sneeze without sounding ridiculous. That means neither stifling yourself or spraying your immediate vicinity.

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

I was feeling well enough to eat the pears.