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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

abstraction, abstract entity go
a general concept formed by extracting common features from specific examples

psychological feature go
a feature of the mental life of a living organism

cognition, knowledge, noesis go
the psychological result of perception and learning and reasoning

structure go
the complex composition of knowledge as elements and their combinations

organization, organisation, arrangement, system go
an organized structure for arranging or classifying

frame of reference, coordinate system, reference system, reference frame
a system that uses coordinates to establish position

noun.cognition

3 Subcategories

Cartesian coordinate system go
a coordinate system for which the coordinates of a point are its distances from a set perpendicular lines that intersect at the origin of the system
inertial reference frame, inertial frame go
a coordinate system in which Newton's first law of motion is valid
space-time, space-time continuum go
the four-dimensional coordinate system (3 dimensions of space and 1 of time) in which physical events are located