null-real duality

Diametrical tension between deductivism (man's thoughts deduce reality) and solipsism (man can only be sure of his thoughts).

Congruent to the a priori-a posteriori duality.

Perpendicular to the true-false duality.

Together with its true-false counterpart, the null-real duality causes the observer to experience existentialism as a double-blind phenomena.

The null-real duality increases the number of arbitrary meta-values to four: true, false, null, real.