Bingo - GIGO.
Pushback from users 'correcting' Grok's answers when they include leftist bias is one way of 'correcting' / retraining Grok on what is 'truth'. Grok does acknowledge correct pushback and modifies it's presentation to such correction. How much that effects other answers to similar queries, not a clue.
One that I did not pushback on, and should have, was an answer from Grok that stated that CO2 accounted for 40% of the greenhouse effect - an answer that is provably wrong by at least a factor of 4x - probably 10x.

Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good ...