Mathematical problems can be understood as questions of the validity of an IFL sentence.
In a manner analogous to Boolean-valued validity, one can introduce an appropriate notion of validity in E of a sentence σ of its internal language.
It combines four contextual methods (using statistics and linguistic information) in order to decide about the semantic validity of a word in a sentence.
The latter rejects 'excluded middle', that is, the validity of the disjunction of a sentence and its negation.[3] In the target non-classical theories (all of which have classical logic as a proper extension), the so-called 'material conditional' (the 'hook' or 'horseshoe') is not a terribly adequate conditional, where the hook is a disguised disjunction, namely ¬A∨B.
Fernandez told HuffPost that given county prosecutors' apparent pattern of "willfully suppressing favorable evidence," there may still be yet-uncovered evidence that could "call into question the validity of a substantial number of convictions and sentences".
Not being a specialist in mass-spec, I cannot judge the validity of the the sentence: "Both reactions scheme would generate an EF-P modified on Lys34 by a β-lysine (146 Da) compatible with the 144 Da modification", - is 144 = 146 within the accepted error margins?
One option is to reject the Ramsey test as a criterion for the validity of conditional sentences (Rott 1986).
In his 1919 paper he established some results for lattices, in particular, he showed that one could decide the validity of universal Horn sentences (i.e., universal sentences with a matrix that is a disjunction of negated and unnegated atoms, with at most one positive atom) by a procedure that we now recognize to be a polynomial time algorithm.
Mr. Berry, who is now 48, had two earlier appeals in which he challenged the validity of his death sentence turned down by the Supreme Court.
A meaning unit can be a part of a sentence, a whole sentence or a paragraph.
