"Colorless green ideas sleep furiously."

Chomsky's generative grammar that supports this^ sentence as both grammatically correct and meaningless.

Maybe Stein was ahead of her time!

re 15-years: ooh that grates especially!

I agree that this looks awful, but at least at one time, it was correct usage: compound adjectives used before a noun, like "15-year career." But you've got to state the noun.