Graspable

The cabin is lined with foam and features a honeycomb structure with 12 windows, each bordered by a foam halo with graspable edges, so the “astronauts” can position themselves for a view of Earth.

The idea behind it is readily graspable: before performing an action which might harm another person, try to imagine yourself in their position, and consider whether you would want to be the recipient of that action.

While most people take the objects of their senses to be real if anything is, Socrates is contemptuous of people who think that something has to be graspable in the hands to be real.