I never know whether you're having us on , or just winding people up!

It's only religionists and the occassional, dottier than usual, philosopher who claims that the realities inside and outside our heads are separate. At least in terms of the physical world.

All they say is that we only see/hear/feel/smell a part of what's there!

A tree falls in a wood. It causes air molecules to oscillate at a certain wavelength and amplitude. This is a physical fact - it happens whether or not anybody hears it. Also, unless somebody can hear it, it stays just that, an oscillation of molecules. But a person within range will perceive the oscillation as a noise, and will be able to follow it to its source and a bunch of free firewood!

There's no separation there, all part of the same process. All equally real.