I don't see personal identity v. non-identity as a binary distinction but a fuzzy one.

Agreed, and a view I've espoused here in the past. My question was actually intended to demonstrate this.

We have to ask ourselves what is our strategy for getting around our horribly skewed lenses onto the world, and onto the mind. I just think that saying 'everything we can think is almost certainly wrong' is a bad start. Where do you go from there? What do you compare your pre-conscious sensory perceptual data to to make sure it's correct?

I don't want to have to train myself not to think, and only to measure. That would take all the fun out of it.