"x"
"bool"
typeOp
nil
opType
1
def
var
"c"
const
1
ref
constTerm
2
def
absTerm
"a"
const
1
ref
constTerm
3
def
appTerm
refl
"y"
1
remove
var
2
remove
absTerm
3
remove
appTerm
assume
eqMp