Which point is true and has nothing to do with the question of whether your claim re the library of Alexandria was false. You could have replied, earlier, that

Which point is true and has nothing to do with the question of whether your claim re the library of Alexandria was false. You could have replied, earlier, that you didn't care one way or another about which library was burnt, and regretted if you had inadvertently spread misinformation about something you were not primarily concerned about. You didn't do that. I take it you are doing that now, just in a far less than civil manner. Please note that I do not use italics, here. If you are defended "final", last destruction of a rebuilt library intended to be as grand - I am unaware of support for this, but would be interested.