equal
deleted
inserted
replaced
3 *) |
3 *) |
4 |
4 |
5 section \<open>The Drinker's Principle\<close> |
5 section \<open>The Drinker's Principle\<close> |
6 |
6 |
7 theory Drinker |
7 theory Drinker |
8 imports Main |
8 imports Main |
9 begin |
9 begin |
10 |
10 |
11 text \<open> |
11 text \<open> |
12 Here is another example of classical reasoning: the Drinker's Principle says |
12 Here is another example of classical reasoning: the Drinker's Principle says |
13 that for some person, if he is drunk, everybody else is drunk! |
13 that for some person, if he is drunk, everybody else is drunk! |