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Mirrors > Home > ILE Home > Th. List > darii | Unicode version |
Description: "Darii", one of the syllogisms of Aristotelian logic. All is , and some is , therefore some is . (In Aristotelian notation, AII-1: MaP and SiM therefore SiP.) For example, given "All rabbits have fur" and "Some pets are rabbits", therefore "Some pets have fur". Example from https://en.wikipedia.org/wiki/Syllogism. (Contributed by David A. Wheeler, 24-Aug-2016.) |
Ref | Expression |
---|---|
darii.maj | |
darii.min |
Ref | Expression |
---|---|
darii |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | darii.min | . 2 | |
2 | darii.maj | . . . 4 | |
3 | 2 | spi 1529 | . . 3 |
4 | 3 | anim2i 340 | . 2 |
5 | 1, 4 | eximii 1595 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wal 1346 wex 1485 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1440 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-4 1503 ax-ial 1527 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: ferio 2120 |
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