Well it's often accepted that psychedelia is a manifestation of the mind, which has more to do with your mind than with ways to achieve psychedelia. Psychedelics facilitate this effect relatively easily but there are more ways to do it like meditation.
Hallucinations are misleading to equate with psychedelia, they have more to do with delerium and more severe forms of realization where you believe something is happening that is not like talking to people that are not there. The definition you read above here says that psychedelics can do this, but its certainly not standard. Hallucinations can happen from things like severe lack of sleep.
While they may appear the same at first because you can experience extraordinary things with both psychedelia and hallucinations, the former is actually a phenomenon arising from disclosed meaning and aspects of your consciousness (as they often have their roots in your normally latent unconscious) while hallucinations are about distortion, noise and unhealthy functioning of the brain.
Sure deleriants have some overlap with psychedelics but IMO the differences are far more important than the similarities!
Hallucinations are misleading to equate with psychedelia, they have more to do with delerium and more severe forms of realization where you believe something is happening that is not like talking to people that are not there. The definition you read above here says that psychedelics can do this, but its certainly not standard. Hallucinations can happen from things like severe lack of sleep.
While they may appear the same at first because you can experience extraordinary things with both psychedelia and hallucinations, the former is actually a phenomenon arising from disclosed meaning and aspects of your consciousness (as they often have their roots in your normally latent unconscious) while hallucinations are about distortion, noise and unhealthy functioning of the brain.
Sure deleriants have some overlap with psychedelics but IMO the differences are far more important than the similarities!