The article presents a probability model of gaining insight into the mentality phenomenon as a reflection of cognitive property and another mind's abilities. The authors establish a point that mentality is a result of the external evaluation since it is not self-reflected by its subject. The mentality is presented not to the subject (the media) of mentality, but to another (not self); it is represented as a cognitive property of another as something non-identical to "not-self" insight into "self" conception (mentality media). Otherwise, namely, in the identity of "self" and "not-self" mentalities, it (the mentality of the media) is not detected. In ontological terms, "non-reflective" mentality is otherness; it remains outside of the subject. In this sense, the "non-reflective" part of the mentality is an alienated form of the neuro-mental subject organization. Substantially belonging to subject. It, nevertheless, is "alienated" from it. And in the cognitive terms, it is "assigned" by another as it is obvious to another. This reflects a sort of duality, dichotomy and the paradox of mentality.