The last couple of days i've slept in the afternoon. All of a sudden tiredness hits and have chosen sleep instead of not. Previously totally unheard of. Could always sleep most anywhere, but never on an ordinary afternoon. Darned if i know though how people take 15 minutes dog-naps. Mine seems to demand at least an hour.
It was Plato who said, “He, O men, is the wisest, who like Socrates, knows that his wisdom is in truth worth nothing”