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Mirrors > Home > MPE Home > Th. List > df-fal | Structured version Visualization version Unicode version |
Description: Definition of the truth
value "false", or "falsum", denoted by ![]() |
Ref | Expression |
---|---|
df-fal |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | wfal 1460 |
. 2
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2 | wtru 1456 |
. . 3
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3 | 2 | wn 3 |
. 2
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4 | 1, 3 | wb 189 |
1
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Colors of variables: wff setvar class |
This definition is referenced by: fal 1462 nottru 1489 |
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