The idealism of esse est percipi, to be is to be perceived, is as unthinking in its own way as any objectivism in presuming that the act of perceiving is self-evident, is as it appears. As if it is enough to gesture at the appearance of appearance. The subject of perception is not perceived and therefore is not according to this teaching, and yet the perceiving is and must then itself be perceived and so on. There is an absurdity in this which corresponds to the de-realisation which dogs all idealisms like a bad smell. Perceiving, which here stands for cognition is general, is understood implicitly as having a transitive nature: something is conveyed to something. The mind abhors a duality and strives to bring the all into a single embrace in whatever it insists upon as the basis. The mind is a theory of the mind, what experiences is neither.