[GeorgeKangas]

Thanks for replying, skohan! Since this item has moved far off the front page, I'm guessing that just about nobody else will be seeing whatever else we write here. If you wish, you can email me at [e-mail] .

Descartes described the clearest identifying property of SE: it's absolutely certain to exist. Since absolute certainty lies outside the scope of science: science can't define what SE is, it can only describe what SE does.

Science doesn't rule out the philosophical hypothesis known as "illusionism" (advocated by Keith Frankish), that SE is a delusion.

If you, skohan, have SE and have correctly identified it: its nonexistence will be inconceivable to you. Are you there yet?