“What the Bleep, Down the Rabbit Hole,” a new sequel to the popular new-age film, “What the #$!%* Do We Know!?,” argues, based on the insights of modern quantum physics, that reality is just a mental construct that we can rearrange and improve.

The films raise a disturbing question about the muddled intersection between science and culture: do we have to indulge in bad physics to feel good?