How do you know someone is a pilot?
They tell you. Again, and again, and again...
Today I managed to convince a different instructor (Peter Swift) in a different plane (1946 Aeronca Champ) at a different airport (Harvey Field, S43) that I'm highly unlikely to kill myself in a plane. So unlikely, that he hopped out and let me fly it myself for a half hour!
I'm pretty damn excited.
BTW, I'm getting a Sport Pilot license which requires about 50% of the time and cost of the Private Pilot license. I can fly planes like the one above, and the new flying car that should make it to market in the next couple of years.