Crossword puzzle clue "descartes wrap up"

Friend of Descartes ... or, in English, question pondered by Descartes?

Descartes wrap-up

Wrap in bubble wrap, maybe

Wrap around a wrap, maybe

Wrap right over left, tuck right underneath, pull, pinch right in a loop, wrap left around, push left through hole to create loop, pull loops

Wrap around a wrap

Soul, to Descartes

Start of Descartes' phrase