OSTRICH, n. A large bird to which (for its sins, doubtless) nature has denied that hinder toe . . . . The absence of a good working pair of wings is no defect, for, as has been ingeniously pointed out, the ostrich does not fly.
Ambrose BierceCogito cogito ergo cogito sum -- "I think that I think, therefore I think that I am;" as close an approach to certainty as any philosopher has yet made.
Ambrose Bierce