Imagine thinking someone who got finished in his absolute prime by a 5'6" Manlet with a 11-7 career record and only 2 career wins by way of TKO has a good chin. Avoiding the stand up isn't the same as having a good chin. There's a reason was GSP had 8 decisions out of 9 in WW title defenses after winning the belt back from Serra. Dude couldn't even finish a middle of the road fighter like Dan Hardy because he was terrified of getting finished on the feet again.
GSP nuthuggers are so delusional. Even GSP knows his chin wasn't good. Why do you think he played it safe ever since the Serra fight? Every other GOAT candidate has a better chin, it's not even a debate.
Jones - Never finished, ate big punches like nothing
Khabib - Never close to being finished
Fedor - Fought at HW, only was finished after his prime by big hitters and had a much riskier style, didn't play it safe.
Silva - Wasn't finished by strikes till he was almost 40 years old. Had an iron chin before that. Even ate the H-Bomb.
GSP - Finished by a guy that's 5 1/2 feet while in his prime who only has 1 other Career finish by strikes. "Derp, but he has a good chin cause he's Canadian and so am I, derp."