  Unfortunately, given the systematic ambiguity and textual variations in the Greek text, the difficulty of telling when Aristotle is speaking with his own voice or characterizing an opponent's argument, and the lack of formal devices for the essential scopal distinctions at issue, it has never been clear exactly just what has been said here and in the chapter more generally. Some, including Boethius and Lukasiewicz, have seen in this text an argument for rejecting LEM for future contingent statements, which are therefore to be assigned a non-classical value (e.g. “Indeterminate”) or no truth-value at  all.[4]  Their reasoning is based in part on the premise that the alternative position seems to require the acceptance of determinism. Others, however, read Aristotle as rejecting not simple bivalence for future contingents but rather determinacy itself.  This interpretive tradition, endorsed by al-Fārābi, Saint Thomas, and Ockham, is crystallized in this passage from Abelard's Dialectica (210–22) cited by Kneale and Kneale (1962: 214):