or catuṣkoṭi wikipedia 
, German sometimes called "Urteils-Vierkant", originates from Indian logic. Here it was first used in jurisdiction. It addresses the question of what positions can be taken with respect to 2 opposing parties.
The position of one party or the other can be taken; a third option would be to say that both are right, and a fourth option would be to say that neither is right.
These are the 4 positions of the tetralemma, whose application was later extended to metaphysical contexts. Nagarjuna, the founder of Madhyamika Buddhism, has criticized that these four positions are not the only possible ways of looking at things, but that there is, in addition, a fifth way of looking at things, which, however, is not a point of view, but reflexively negates itself.
In response to a question to Nagarjuna about taking a stand again, he replied, "If I had ever made assertions, you would be right. Alone, I have never done so." So we are dealing with a non-position in the fifth way of looking at things. Madhyamika Buddhism speaks here of the fourfold negation.
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SPARRER, Insa, VARGA VON KIBÉD, Matthias and SIMON, Fritz B., 2010. Klare Sicht im Blindflug: Schriften zur Systemischen Strukturaufstellung.Heidelberg: Carl-Auer-Verl. ISBN 978-3-89670-747-5, p. 169