Danko Nikolic, a researcher at the Max-Planck Institute for Brain Research, has come up with a theory called "ideasthesia," which questions the reality of two philosophical dualities: 1.) the mind and body, and 2.) sense perception and ideas. Nikolic's research suggests that these dualities may not exist at all, and particularly that sense perception and ideas are inextricably bound up in one another. If you want to better understand "ideasthesia," I can't recommend reading the term's Wikipedia page. It's tough sledding. But you can make it through Nikolic's TED-Ed video released last month. It still requires you to wear a thinking cap. But if you're reading this site, you're probably willing to put one on for five minutes.