Of course, Dan Quayle is wrong.
The right way to spell POTATO is….
GHOUGHPHTHEIGHTTEEAU
GH stands for P as in Hiccough
OUGH stands for O as in Dough
PHTH stands for T as in Pthisis
EIGH stands for A as in Neighbour
TTE stands for T as in Gazette
EAU stands for O as in Plateau