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Theorem bocardo 2056
 Description: "Bocardo", one of the syllogisms of Aristotelian logic. Some is not , and all is , therefore some is not . (In Aristotelian notation, OAO-3: MoP and MaS therefore SoP.) For example, "Some cats have no tails", "All cats are mammals", therefore "Some mammals have no tails". A reorder of disamis 2054; prefer using that instead. (Contributed by David A. Wheeler, 28-Aug-2016.) (New usage is discouraged.)
Hypotheses
Ref Expression
bocardo.maj
bocardo.min
Assertion
Ref Expression
bocardo

Proof of Theorem bocardo
StepHypRef Expression
1 bocardo.maj . 2
2 bocardo.min . 2
31, 2disamis 2054 1
 Colors of variables: wff set class Syntax hints:   wn 3   wi 4   wa 102  wal 1283  wex 1422 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-5 1377  ax-gen 1379  ax-ie1 1423  ax-ie2 1424  ax-4 1441  ax-ial 1468 This theorem depends on definitions:  df-bi 115 This theorem is referenced by: (None)
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