In is what we are thinking about now. In is the momentary reality into which we are tuned. 526.27 Physics finds that Universe has no solid things surrounded by, and interspersed with, space. 526.30 Systematic Communication of Space 526.31 Space is the invisible complementation of the cognitive system. 526.32 Space is the unconsidered complement of the conceptually considered episode and its only neighboringly overlapped episodes of Scenario Universe.
Space is the untuned-in complement of considerability and conceptuality.
Special case is imaginable by brain. Conceptuality is a function of mind. Conceptuality is a priori independent of special case frequency tunability. Conceptuality is generalized, and the space complementation of generalized conceptuality is generalized. Space is generalization.