How are Dark Mtter and Consciousness different from Spirit?

[robvalue]

Thanks Rhonda

It seems most of us are in agreement, but to repeat the question:

Doesn't "physical" simply mean "literally exists"? Or, "Is able to have an effect"? Is there a further property I'm missing?

I agree with Rhonda, if we're hypothesising a spirit, that sounds unfalsifiable. To me, it also doesn't seem like an explanation at all. What is the difference between this and garden variety magic? Why would non-physicality have explanatory properties? If it's simply that the physical cannot ever be an explanation, how did we reach that conclusion?

A very interesting discussion all round, thanks