I originally attempted using the modify function but it doesn't do anything and just prints false, I don't know what I am doing wrong.
I used
(modify ?tv (v ?x))
it didn't work. I then used
(retract ?tv)
(assert (v ?x))
instead, which worked. But I don't want to type that out every time I want to modify a fact, so I made a deffunction to do it for me, but
(deffunction modfact(?index ?factname ?factvalue)
(retract ?index)
(assert (?factname ?factvalue))
)
in this it gives a syntax error of:
[PRNTUTIL2] Syntax Error: Check appropriate syntax for first field of a RHS pattern.
ERROR:
(deffunction MAIN::modfact
(?index ?factname ?factvalue)
(retract ?index)
(assert (?factname
Which seems to me that its saying that I can't actually make this function because I can't assert a fact with the value of the variable. How can I get this to work?