And thus a theory dies.

"St. Stephen of Qi" once proved that apples float on water while pears sink.
I had a hypothesis that since Apples had quite a bit of air around the pips in the core it might work as floatation aids as the pips of any Pears I have devoured have been devoid of said chambers, the pips being embeded in the flesh.
Test hypothesis:- NO WORKY!
:¬(
Apple 1/4 still floats.
Pear 1/4 still sinks.