From e9e80fc389365e24d4300d7d5390c7d833a96c50 Mon Sep 17 00:00:00 2001 From: aarne Date: Wed, 25 Jun 2008 16:54:35 +0000 Subject: changed names of resource-1.3; added a note on homepage on release --- examples/systemS/ex4.txt | 13 ------------- 1 file changed, 13 deletions(-) delete mode 100644 examples/systemS/ex4.txt (limited to 'examples/systemS/ex4.txt') 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 -- cgit v1.2.3