Bengaluru, Nov. 20 -- It began as a casual on-stage interaction, but within minutes, mentalist Suhani Shah had an entire auditorium at the Bengaluru Tech Summit holding its breath. The premise was simple: Suhani would attempt to discern a deeply personal answer from participant Axiom Space Astronaut and Group Captain Shubhanshu Shukla, an answer he insisted was unknowable, unsearchable and unrevealed to anyone.

Suhani, known for her calm stage presence, began by reassuring Shukla that the exercise required nothing more than honest thinking and strong visualization. Shukla, meanwhile, admitted he was a little nervous. "I'm kind of scared standing next to you," he joked, worrying she might discover his mind was "not as intelligent" as she cl...