A Basic Definition of Spirituality (of True Faith)

[Angrboda]

Angrboda:
 

“What evidence do you have to support your belief that this is the case, whatever you mean by it?”

 
- We know that regular meditation supports the development of the Frontal Cortex (The part responsible for impulse control and creative thinking) of our brains.
 
+ At some point those who attain levels like “Samadhi” get to experience this “Pure consciousness” themselves in a way that is not based on anything but direct experience (the same principles are at work at other schools of spiritual enlightenment)

I see you've drunk the koolaid. The frontal cortex performs multiple functions. Saying meditation supports development of it isn't linking it to anything specific.

Those who get to experience samadhi claim that it is such and so. That doesn't make the claim true. Meditation and mindfulness have effects on consciousness' phenomenology, what the specific nature of those changes signifies is not clear. Since it's a part of the claim that it is some kind of super conscious state, and not something in the evidence, this makes the evidentiary value nil.

You're simply putting the cart before the horse. Assuming the claims are true in determining what counts as evidewnce. That's not how it works.