Assuming I have defined a relation between two values but have not yet specified the relation for a specific value, is there a condition I can test that will tell me the relation hasn’t been defined yet?
For example:
Following relates various scenes to one scene (called the sequel). The verb to follow means the reversed following relation.
Scene A is a scene. Scene B is a scene. Scene B follows Scene A.
This means Scene B has no sequel but I can’t figure out how to test for that. Any ideas?
Thanks.
Jesse