Controllability vs Maneuverability?

[dtuuri]

but isn’t the last part of the control ability definition “regardless of it’s stability”?

This is the real definition from the PHAK:

From the PHAK Glossary:

Controllability.
A measure of the response of an aircraft
relative to the pilot’s flight control inputs

Maneuverability.
Ability of an aircraft to change directions
along a flight path and withstand the stresses imposed upon it.

The other "definition" was lifted from a poorly written chapter on aerodynamics. So, I feel for the upcoming CFI for having to try to understand the text and then have to withstand a test from somebody tasked with evaluating that understanding. It all sounds like double talk to me.

I would ditch the book and say "maneuverability" is what the sales department tells the customer and "controllability" is linked to static stability—the lower limit of static stability is a design limit set by the upper limit of controllability. Then cite Aerodynamics for Naval Aviators. That should shut 'em up. What it means is, the less the positive stability, the more the controllability (and vice versa).