Tetralemma - Тетралемма

The relationship between two sets, A and B, is a tetralemma if there are four possibilities. There are phenomena that are members of

(1) both set A and set B,

(2) neither set A nor set B,

(3) only set A, but not set B, or

(4) only set B, but not set A.

Tibetan: མུ་བཞི། mu-bzhi

J. Hopkins: Four possibilities

Source

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