Mxsmanic wrote:
Martin writes:

The average IQ of US enlisted men tested during WW1 was that of a12
year old.

IQ does not vary with age, so "the IQ of a twelve-year-old" has no
meaning.

Sure it has meaning. It just isn't very persice terminology. IQs take age
into account. If I say, "MX has the IQ of a rat's ass" what I am really
saying is, "MX has the IQ of an average rat's ass."

The same goes for saying someone has the IQ of a 12 year old.