Wikipedia
Multiperspectivalism (sometimes triperspectivalism) is an approach to knowledge advocated by Calvinist philosophers John Frame and Vern Poythress.
Frame laid out the idea with respect to a general epistemology in his 1987 work The Doctrine of the Knowledge of God, where he suggests that in every act of knowing, the knower is in constant contact with three things (or "perspectives") – the knowing subject himself, the object of knowledge, and the standard or criteria by which knowledge is attained. He argues that each perspective is interrelated to the others in such a fashion that, in knowing one of these, one actually knows the other two, also. Poythress developed the theme with respect to science in his 1976 book Philosophy, Science, and the Sovereignty of God and with respect to theology in his 1987 book Symphonic Theology.