Philosophy Lexicon of Arguments

Disjunction: linking two or more statements by an inclusive "or". The disjunction is only false when all disjuncts are false. Notation v. See also adjunction, alternation, conjunction, compound sentences.
Author Item Excerpt Meta data
Armstrong, D.M.
Books on Amazon
Disjunction III
Disjunction of prop > disjunctive predicates/Armstrong: a single predicate "M" could be used for "A or B or C" > "grue"/Armstrong: simplified form: green becomes blue and at the same time blue becomes green - new pair of pred: bleen/grue: nothing changes relative to the pair: green> blue: remains bleen, blue> green. Remains grue - but: a thing that remains blue changes relative to the new pair bleen/grue - Question: what kind of predicates priority?
III 68
Disjunction/Disjunctive Properties/System/Order/F.o.Th./Armstrong: Example, a natural system contains three fundamental laws: Fs are Gs, Hs are Js, Ks are Ls - these are united as follows: we define M: "an F or an H or a K" N: "a G or a J or an L" - then we have a single "fundamental law": "Ms are Ns" - then "F is an N": less informative but apparent improvement: G = J = L: no more information than "F is G v J v L". But if "N" is a true property, then "G", "J", "L" are merely artificial subdivisions (Armstrong pro) ( disjunction, identity) (>grue) - (s) otherwise we would always have to say "yellow or black Banana").
Disjunctive properties: being G or H": ArmstrongVs - Problem: disj. laws: does not the unrealized alternative need to be missing first? - disjunctional predicates always possible, but no real relation

AR II = Disp
D. M. Armstrong

Dispositions, Tim Crane, London New York 1996

D. Armstrong
What is a Law of Nature? Cambridge 1983

> Counter arguments against Armstrong

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Ed. Martin Schulz, access date 2017-03-24