Alexander Pfander's classical phenomenological logic, a masterwork of unmatched clarity, is presented here for the first time in English. The book unfolds the general essence of logic, its object, not acts of thinking but objective "thoughts," meanings and higher unities formed by them: the nature and kinds (1) of judgments (propositions) and their truth and truth claims, (2) of concepts, and (3) of inferences; (4) the first foundational principles of logic (the principles of identity, contradiction, excluded middle, and sufficient reason) and of valid inferences, their foundation in...