anabsan>

Theorem.

Arguments:

phi (pr), psi (pr), chi (pr),

Hypotheses:

((phiwedge(psiwedgepsi))tochi)

Assertions:

((phiwedgepsi)tochi)

Proof:

Hyp Ref Line Expr
Hypo1((phiwedge(psiwedgepsi))tochi)
1anass2(((phiwedgepsi)wedgepsi)tochi)
2<anabs>3((phiwedgepsi)tochi)