[shrughes]

But any reasonable person should be able to answer the speed of sound question. After all, the rule of thumb for estimating lightning distance is that every 5 seconds is 1 mile. Reciting a definition is no better than reciting a string of digits.

[sofal]

Are you saying that people who do not know that rule of thumb are not reasonable people?

[shrughes]

I obviously am.

[sofal]

Chalk me up as unreasonable then, as I had never bothered to remember that rule.

[icebraining]

That rule of thumb only works in a very small number of countries ;)