It would be a poor joke to say 'three things are rising: the tide, hopes, and the average age of death', because 'rising' has different senses in each context

Since the passing of the non-literal into the standardized literal is not exactly a transition whose time of occurrence is obvious, it will be difficult in some cases to tell what has been lexicalized as a different meaning and what has not (think, again, of ‘deadline’ as a case, which once meant a line the crossing of which would result in your death. Think of that next time you are late with a paper…) 5. Philosophical Issues There are a few main philosophical issues involved in ambiguity. 1