--- a/doc-src/TutorialI/CTL/CTL.thy Fri Feb 16 08:10:28 2001 +0100
+++ b/doc-src/TutorialI/CTL/CTL.thy Fri Feb 16 08:27:17 2001 +0100
@@ -247,7 +247,7 @@
What is worth noting here is that we have used @{text fast} rather than
@{text blast}. The reason is that @{text blast} would fail because it cannot
cope with @{thm[source]someI2_ex}: unifying its conclusion with the current
-subgoal is nontrivial because of the nested schematic variables. For
+subgoal is non-trivial because of the nested schematic variables. For
efficiency reasons @{text blast} does not even attempt such unifications.
Although @{text fast} can in principle cope with complicated unification
problems, in practice the number of unifiers arising is often prohibitive and