Duality
We humans are accustomed to think in dualities (good - bad, light - dark ...)
By that problems up to a certain complexity can be solved.
For many problems bipolar approaches lead to blocks or deadlocks.
To overcome these blockages can be achieved by the third Position / triangulation
(Thesis-antithesis-synthesis, Trinity, body mind spirit, father-mother-child, 3-body problem in mechanics)