Mathematics
justified
truth
vacuous truth
logical truth
truth
verificationism
Russell
Russellian
monk
admin
A Solution of the Decision Problem for the Lewis systems S2 and S4, with an Application to Topology
computing
first order
sequent
behaviorism
René Descartes
Raham Asha
Ruth Barcan Marcus
Rudolf Carnap
journalism
someday
Explication
A Critical Exposition of the Philosophy of Leibniz
Ronald Rivest
approach
Raymond M. Smullyan
Stoic
Tractatus Logico-Philosophicus
consequence relation