Logic is a psychological discipline, as certainly as cognition occurs only in the psyche and the thinking which completes itself in it is a psychic event.
Die Logik ist eine psychologische Disziplin, so gewiss das Erkennen nur in der Psyche vorkommt und das Denken, das sich in ihm vollendet, ein psychisches Geschehen ist.

Psychologists
Theodor Lipps
Theodor Lipps (1851-1914) was a German philosopher and psychologist who, as professor at Munich from 1894 until his death, gave the concept of Einfühlung — empathy, literally feeling-into — its scientific shape. His aesthetics, his theory of unconscious mental events, and his logical psychologism made him one of the most cited German academics of his generation. He fed directly into Freud's account of jokes and the unconscious and into the early Munich phenomenologists. Yet from 1900 onward Husserl's Logical Investigations treated his psychologism as the textbook target, his students defected to phenomenology, and Lipps slipped into a long eclipse. Mirror neurons and embodied simulation research have since revived him as a founder of empathy science.
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