It is not specific and left to the listener or reader to infer the correct or implied meaning. I have usually seen it written with a slash: "and / or" which me

It is not specific and left to the listener or reader to infer the correct or implied meaning. I have usually seen it written with a slash: "and / or" which means one of either "and" or "or" and the reader or listener should interpret which one is correct. In a Venn diagram sense, it would mean either an intersection or union. >> It seems to me that it's something easy to say, and easy to feel "yes I understand that" but when you think more about it, perhaps that clarity present in the initial impression dissipates, and you're left wondering..."What exactly did I just say?" It is not precise language. It is a shortcut phrase, similar to "you know what I mean?" Does the listener REALLY know what is meant or do they just think that they do?