Possession is the actual holding of a thing, whether or not one has any right to do so.

The holding of a thing to be true is a phenomenon in our understanding which may rest on objective grounds, but requires, also, subjective causes in the mind of the person judging.

Hence a judgement of this kind has only private validity- is only valid for the individual who judges, and the holding of a thing to be true in this way cannot be communicated.