“…Although Łukasiewicz insisted that 'both disjunction and conjunction of two possible propositions are possible propositions (and nothing else)' (cf. [26], p. 19), this attitude leads to difficulties when interpreting the propositions a ∨ ¬a and a ∧ ¬a, which, despite of an indeterminacy of the proposition a, should have a determinate truth-value 1 or 0, respectively. Whereas these kinds of difficulties, which have been called 'a serious blow upon Łukasiewicz's conception' ( [26], p. 21), might well have led G ödel to his new definitions of disjunction and conjunction, this section will mainly concentrate on the interplay between implication and conjunction, which is another possible source for his investigations.…”