9 lines
No EOL
120 B
Text
9 lines
No EOL
120 B
Text
Theorem T2 (a b : Bool) : b => a \/ b.
|
|
apply imp_tac.
|
|
apply disj_tac.
|
|
back.
|
|
back.
|
|
assumption.
|
|
done.
|
|
|
|
Show Environment 1. |