They probably meant introspection. It is usually considered poor evidence in science and is therefore seldom used.
Yes.
The clearest evidence to me was introspective observation of the existence of my own soul, its relationships, and its reactions.
This is a statement that someone of literally any religious or spiritual belief can make. Because it can be used to support any belief, it makes it a worthless piece of 'evidence' for anyone who exists outside your own head.
reply