In a STACK question, I want to ask for two numbers, a and b
so I have a PRT for a and one for b.
In case, both inputs are given (a and b), I want to check if they meet a certain condition (say, a=b) and give a hint, if that condition isn't met, but keep silence if it is met.
Now, if I integrate that test into one or both PRTs for a and b, then there will only be feedback upon "check", if both inputs are given. Therefore, this is not an option.
On the other hand, if I add a separate PRT for this check, then it seems that I can't suppress the wrong/write statement.
Thus I have twice "right" under the last input, which looks stupid. How can I get rid of that?
I already learned that I can switch off automatic feedback from a PRT node, but that doesn't seem to affect the right/wrong/partially right response.
I see a hard workaround: delete the default answers in the question options and add wrong/right to the PRT feedback. This would be very inconvenient and prone to inconsistency.