There will come a point when people have to admit that Sanders's polls vs. Republicans

[Chathamization]

60. The claim that her negative are already locked in and won't change much also seems to be false

Going by this chart, the line that everyone has known her for so long that she's hit her floor in terms of negative feelings seems to be flat out wrong. It's also somewhat odd to claim that everyone knows so much about her that they've already made up her mind about her, and then claim that the general election polls are meaningless - at the very least, they should show how much support she has out there (again, if you went by the flawed narrative that most people have already made up their mind about her).

It's also worth looking at the polling trends. We're not just seeing statistical noise here, but a clear downward trend in terms of Clinton's match up against Republicans, and a clear upward trend in terms of Sanders match up against Republicans.

Of course, none of this means we can be certain about how the general election plays out. But throwing out data as meaningless and going by gut feelings instead doesn't seem like a great idea.