I want to hear gwern's research into the Algernon problem for it, first.

I hypotheses about why things avoid the Algernon problem generalize and attributing a specific technique or tool to any given Algernon bipass is largely a matter of telling just so stories. Far, far more interesting (or failing that more useful) is what research gwern can find whether this stuff works and is safe. We don't need him to find an excuse for it to work and he doesn't have enough information available to make strong credible claims about Algernon's law as applied to TDCS.