bivalencen.
/ˈbɪvələns//ˌbʌɪˈveɪləns/ In various subjects: the quality of being bivalent; bivalency; spec. in Logic, principle of bivalence (see quots.).
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the world > matter > chemistry > valency > [noun] > valency of two
bivalence1889
the world > life > biology > biological processes > genetic activity > genetic components > [noun] > chromosome > chromosomes in respect of meiosis
trivalency1888
zygosome1905
bivalence1909
zygonema1911
trivalent1922
quadrivalent1923
quinquevalent1926
multivalent1929
nullisomic1932
bivalent1937
nullisome1944
the mind > mental capacity > philosophy > logic > logical truth > [noun] > truth value > terms relating to
matrix1914
truth table1920
principle of bivalence1951
constative1955
1889 Cent. Dict. Bivalence (Chem.), a valence or saturating power which is double that of the hydrogen atom.
1909 Cent. Dict. Suppl. Bivalence of the chromosomes, the double as distinguished from the single (univalent) condition of the chromosomes, for example, in the oöcytes and spermatocytes of one of the forms of Ascaris megalocephala.
1951 J. Łukasiewicz Aristotle's Syllogistic iv. 82 The so-called principle of bivalence, which states that every proposition is either true or false, i.e. that it has one and only one of two possible truth-values: truth and falsity.
1962 W. Kneale & M. Kneale Devel. Logic ii. 47 The principle that every statement is true or false is called the Principle of Bivalence.
This entry has not yet been fully updated (first published 1972; most recently modified version published online September 2018).
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n.1889