Believing that 2 + 2 = 5 will most likely cause one to fail to build a successful airplane, but that does not prohibit one from believing that one’s own arithmetic is perfect, and that the incompetence of others, the impossibility of flight, or the condemnation of an airplane-hating god is responsible for the failure.
See my edit. Basically, the enemy airplanes flying overhead and dropping bombs should convince you that flight is indeed possible. Also any remaining desire you have it invent excuses will go away once one of the bombs explodes close enough to you.
Believing that 2 + 2 = 5 will most likely cause one to fail to build a successful airplane, but that does not prohibit one from believing that one’s own arithmetic is perfect, and that the incompetence of others, the impossibility of flight, or the condemnation of an airplane-hating god is responsible for the failure.
See my edit. Basically, the enemy airplanes flying overhead and dropping bombs should convince you that flight is indeed possible. Also any remaining desire you have it invent excuses will go away once one of the bombs explodes close enough to you.