Spectrum wrote:Human senses are limited but they do not limit human knowledge. Human knowledge is obtainable from other sources, e.g. reason, instincts, intuition, reflections, technology, etc.

It is 'reason' (empirical to pure) that enable us to speculate 'what if', e.g. possibly a thousand senses, god and the likes.

However these speculations need to be verified empirically and rationally. How well we can justify the empirical and rational can be improved by increasing our cognitive powers internally (mentally) and externally (technologically). I think, now is the time for humanity to expedite more explorations and researches into the above improvements. There are already signs we are on the way with new findings in the neurosciences, genetics, etc.