It is tempting to suppose that this term means non-actual existence.
Nonetheless, the will may affirm or deny such content. First, Descartes contends that a response to this question presupposes an explanation of the union between the mind or soul and the body.
For now, let us examine what Descartes thought about the senses as a source of knowledge that was different from the pure intellect. Surely Descartes maintains that mind and body are two substances but in what sense, if any, can they be considered incomplete?
Once this principle is established, Descartes looks for an idea of which he could not be the cause. Some of Descartes' followers adopted an occasionalist position, according to which God mediates the causal relations between mind and body; mind does not affect body, and body does not affect mind, but God gives the mind appropriate sensations at the right moment, and he makes the body move by putting it into the correct brain states at a moment that corresponds to the volition to pick up the pencil.
Besides, Locke believes in the knowledge that is equated to a significant degree and not that which is based-on perception. But the idea of the most perfect being, containing all perfections, includes existence, since existence is a perfection.