Rand Ayn - Alissa Rosenbaum; rationalism; Rawls John; realism; realism perceptual; reality; reason; recollection; recursion; reductio ad absurdum; reductionism; redundancy theory of truth; reference; Regan Tom; vagueness; Vaihinger Hans; valid - invalid; Valla Lorenzo; value; Veblen Thorsten; Venn John; Venn diagrams; verbal dispute; verecundiam - argumentum ad; verifiability principle; veritas; vernunft; Verstehen;