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fthomas/proof.txt

Last active August 21, 2020 10:32
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inference
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proof.txt
https://www.umsu.de/trees/#((a%E2%86%92c)%E2%88%A7(b%E2%86%92d))%E2%86%92((a%E2%88%A7b)%E2%86%92(c%E2%88%A7d))
---
A -> C
B -> D
A & B
---
C & D
// conjunction elimination with A & B
A -> C
B -> D
A
B
---
C & D
// conditional elimination (modus ponens) with A and B
C
D
---
C & D
// conjunction introduction with C and D
C & D
---
C & D QED.
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