Our examination of subconscious processes in the two classes of phenomena thus far studied—post-hypnotic phenomena and artificial hallucinations—permits the following general conclusions: First, there is positive evidence to show that in some instances, in their intrinsic nature, they are coconscious. In other instances, in the absence of such evidence, it is permissible to regard them as unconscious. Second, that in the quality of the functions performed they frequently exhibit that which is characteristic of Intelligence. This characteristic will be seen to be still more pronounced in the phenomena which we shall next study. ----- Footnote 72: I forbear to enter into the question of the nature of consciousness and matter. In the last analysis, matter and mind probably are to be identified as different manifestations of one and the same principle—the doctrine of monism—call it psychical, spiritual, or material, or energy, as you like, according to your fondness for names. For our purpose it is not necessary to touch this philosophical problem as we are dealing only with specific biological experiences. Footnote 73: Also quite commonly termed the Subconscious. Unfortunately the term unconscious, as noun or adjective, is used in two senses, viz., (1) pertaining to unawareness (for example, I am unconscious of such and such a thing), and (2) in the sense of not having the psychological attribute of consciousness, i.e., non-conscious. In the first sense the adjective is used, as in the phrase “unconscious process” to define a process of which we are unaware without connotation as to whether it is a psychological process or a brain process; also the noun (The Unconscious) is used to signify something not in awareness regardless of whether that something is psychological or not; on the other hand, as an adjective it is also used, as in the phrase “unconscious ideas,” to specifically signify real ideas of which we are unaware. In the second sense, as noun or adjective, it is used to denote specifically brain residua or processes, which, of course, are devoid of consciousness. With this interchange of meaning the term is apt to be confusing and is lacking in precision. _In the text unconscious will be used always with the second meaning, unless inverted commas or the context plainly indicate the first meaning._ (Cf. Lecture VIII, pp. 248-254). Footnote 74: Also termed by some writers _unconscious_. (See preceding footnote.) Footnote 75: Pierre Janet: L’automatisme psychologique, Paris, 1889, and numerous other works. Footnote 76: Not included in this volume. Footnote 77: