How are Dark Mtter and Consciousness different from Spirit?

[Rhondazvous]

https://en.wikipedia.org/wiki/Dark_matter

The dark matter hypothesis attempts to explain observations of gravitational effects on visible matter, gravitational lensing of background radiation and to account for discrepancies between two calculations of the universe's mass. Calculations made through dynamical and general relativistic means are much greater than those based on the mass of the visible "luminous" matter.

Dark matter, spirit and consciousness are all hypothetical existences that cannot be directly observed, but only inferred as explanations for that which can be observed.

You all know my views on theism and they have not changed. The existence or nonexistence of spirit has no more bearing on the existence of god than the existence of felines has on the existence of the Cat in the Hat.

My purpose here is to look honestly at the phenomenal world. I would not be honest of I did not put science through the same rigors that I do religion. So friends, lovers, brothers, sisters, and all the ships at sea, let’s look at this question and work out an answer that is worthy of those who pride themselves in scientific reasoning.

Question is this” how is it that we give serious scientific consideration to the possibility of the existence of dark matter, and consciousness but dismiss the possibility of spirit when evidence for all these is based on the same thing.