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Diffstat (limited to 'examples/systemS/ex4.txt')
| -rw-r--r-- | examples/systemS/ex4.txt | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/examples/systemS/ex4.txt b/examples/systemS/ex4.txt deleted file mode 100644 index 7a91011da..000000000 --- a/examples/systemS/ex4.txt +++ /dev/null @@ -1,13 +0,0 @@ -[ |- (A -> B) v (B -> A) ] ------------------------------- Reductio ad absurdum -[ ~ ((A -> B) v (B -> A)) |- _|_ ] ------------------------------- de Morgan 1 -[ ~ (A -> B) & ~ (B -> A) |- _|_ ] ------------------------------- Conjunction split -[ ~ (A -> B), ~ (B -> A) |- _|_ ] ------------------------------- Implication negation -[ A, ~ (B -> A) |- _|_ ] ------------------------------- Implication negation -[ A, ~ A |- _|_ ] ------------------------------- Ex falso quodlibet _|_ -Ø |