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Mirrors > Home > ILE Home > Th. List > dcim | Unicode version |
Description: An implication between two decidable propositions is decidable. (Contributed by Jim Kingdon, 28-Mar-2018.) |
Ref | Expression |
---|---|
dcim |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-dc 821 |
. 2
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2 | df-dc 821 |
. . . . . . . 8
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3 | 2 | anbi2i 453 |
. . . . . . 7
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4 | andi 808 |
. . . . . . 7
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5 | 3, 4 | bitri 183 |
. . . . . 6
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6 | pm3.4 331 |
. . . . . . 7
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7 | annimim 676 |
. . . . . . 7
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8 | 6, 7 | orim12i 749 |
. . . . . 6
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9 | 5, 8 | sylbi 120 |
. . . . 5
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10 | df-dc 821 |
. . . . 5
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11 | 9, 10 | sylibr 133 |
. . . 4
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12 | 11 | ex 114 |
. . 3
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13 | ax-in2 605 |
. . . . 5
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14 | 13 | a1d 22 |
. . . 4
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15 | orc 702 |
. . . . 5
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16 | 15, 10 | sylibr 133 |
. . . 4
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17 | 14, 16 | syl6 33 |
. . 3
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18 | 12, 17 | jaoi 706 |
. 2
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19 | 1, 18 | sylbi 120 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() |
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-in1 604 ax-in2 605 ax-io 699 |
This theorem depends on definitions: df-bi 116 df-dc 821 |
This theorem is referenced by: pm4.79dc 889 pm5.11dc 895 dcbi 921 annimdc 922 |
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