*sigh*
No, they don't need to be addressed. They aren't even "points."
I tried very hard when Trump was our blathering, incoherent CINC, to not make hay out of his obvious failures of speech. He's an old man and was never particularly articulate, and so I endeavored to limit myself when criticizing his speeches to obvious lies, false claims, and egregiously bad opinions. That he could occasionally get halfway through a word and then fumble his way into a completely different word was embarrassing, perhaps, but not materially important.
Without doing any research into this, I recall that at least three members of Biden's close family have had serious cases of cancer, and I'm pretty sure (but could be wrong, and don't really care enough to Google it) he's discussed having growths removed. Like Trump, the man is old, and has never been a particularly good public speaker. But he's not going to pretend to have had cancer just to get a crowd's sympathy; neither is he going to use that opportunity to break the very important national news that he, the sitting president, has a malignant cancer. A far more charitable reading, and by far the most likely one, is that the man misconjugated a verb or, less charitably, lost his way while personalizing his family's cancer issues.
If you're predisposed to view Biden as senile or pathologically dishonest, of course, you're going to leap to another explanation. But let's not pretend that the people making hay about this in the right-wing blogosphere are doing anything but manufacturing concern about an issue that could only matter if Biden did in fact have cancer and chose that moment to announce it, which would frankly be remarkable.
I understand why it is so incredibly important to you for this to be part of a larger narrative that fits your overarching storyline, William. But it's crazy talk.
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But, hey, let's be unfair for a second. I don't like playing with equivalences, but I think we have an obvious one to bring up, here. What do you think Trump's false claim during the campaign to have seen televised footage of "thousands of thousands" of people in the street cheering as the WTC fell says about his character or the skill of his handlers? How many such unforced errors do you think Trump would need to make to be demonstrably incapable of communication?