mpi
Theorem.
A nested modus ponens inference.
Arguments:
(pr),
(pr),
(pr),
Hypotheses:
(
(
))
Assertions:
(
)
Proof:
Hyp
Ref
Line
Expr
Hypo
1
(
(
))
2
1
com12i
3
(
(
))
2, 3
ax-mp
4
(
)