I'm not advocating another sense. I'm also not saying the evolutionary process has arrived at it's destination biologically; that humans (read the human mind) will continue to grow and adapt to the environment as it always has. Voluntary choice so to speak has been the latest evolution and who knows where the prefrontal cortex is headed in the next 10,000 generations. What I'm asking is that when we get to that stage, how will we look back on sense perception and the nature of reality, like we do with our ancestor of a meager 1000 years ago! If the conditions for acquiring knowledge evolve, it means that our current understanding of reality would evolve as well. Which raises several questions about where we are and what we know now.