If you mean the quoted claim, does your previous misunderstanding cause you to update your belief in your own motive-grasping powers?

I don't believe I said I misunderstood anything and looking back at what I have previously said doesn't lead me to that conclusion either. I just didn't see any point in being more confrontational than polite disagreement. (And I give myself a big burst of self-approval reward for my restraint.)

Based on other times I have noticed that I misunderstood something I expect that I would update rather significantly if such were the case. I hate making mistakes like that.