12 lines
234 B
Text
12 lines
234 B
Text
import logic
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open tactic
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variables a b c d : Prop
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axiom Ha : a
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axiom Hb : b
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axiom Hc : c
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print raw
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have H1 : a, by assumption,
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then have H2 : b, by assumption,
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have H3 : c, by assumption,
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then have H4 : d, by assumption,
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H4
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