The semantics of variables, particularly singleton variables, and variables used in fact blocks, is not sufficiently clear from the learning materials provided. We need to address rules like variables used in the conclusion should appear in the conditions, and all variables should be constrained, and explain the problems of singleton variables.
The semantics of variables, particularly singleton variables, and variables used in fact blocks, is not sufficiently clear from the learning materials provided. We need to address rules like variables used in the conclusion should appear in the conditions, and all variables should be constrained, and explain the problems of singleton variables.