[tnecniv]

Clearly your professor hasn’t had to stand upright in his career or walk for that matter.

The (spring loaded) inverted pendulum was one of the earliest analyzed models of legged locomotion.

[FirmwareBurner]

Yeah, his professor wasn't too bright if he said that. He probably never heard of Segway, One-Wheel, "hoverboards", or motorcycles with stability control.

[bandrami]

None of which existed in 1995

[FirmwareBurner]

Ok, then how about the gun barrel stabilizers on tanks and gunships which had PID controllers since WW2.

[bandrami]

Now compare those to the number of thermostats built since that time