It's interesting to imagine how different the security landscape would be if human brains could easily transcribe a smallish quantity of high-value bits [0] and then compare two versions for exact equality.

I think the exact and trusted data-movement is the hard part. If we could instantly transcribe a 150 digit number (~512 bits) from eye to fingertips, then the actual memory/comparison could be done in any pocket-calculator, with X-Y==0.