Know how and how much to tip people who expect gratuities, even in the case of poor service.

[When asked if the voice is an instrument:] Yes, of course. Some are violins, some are fountain pens and some are stethoscopes. And others are just washboards.

Be able to cite three good qualities of every relative or acquaintance that you dislike.

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

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

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

Be able to analyze statistics, which can be used to support or undercut almost any argument.