My point is everyone notices that to some degree, unless they're dead like you pointed out. Having an expectation on absolute 0 sensation is unrealistic. The p

My point is everyone notices that to some degree, unless they're dead like you pointed out. Having an expectation on absolute 0 sensation is unrealistic. The purpose of a deprivation tank in this scenario is to reduce/deny as much sensory input as possible, leaving just mental stimulation, aka mediation.