You've caveated the "valid" answers out of existence. But here are some examples of or-ed concepts: * parent or legal guardian (shows up on legal forms all the

You've caveated the "valid" answers out of existence. But here are some examples of or-ed concepts: * parent or legal guardian (shows up on legal forms all the time) * state or province (an English language political construct) * DNS name or IP address You could argue that "parent of legal guardian" is a legacy concept since it really just means "legal guardian", but it's literally written on legal forms, so it's a domain concept, except if you believe it shouldn't count because it's an anachronism. You could argue that we don't need "state or province" since we can just say "region", but "region" doesn't mean "state or province" colloquially, and we have to be careful not to refer to Ontario as a state, so the distinction is important. Ironically, that distinction does not exist in Chinese, but it does in English. "DNS name or IP address" absolutely are two different concepts, it just happens that URL's were specced to accept both as the "host" segment. So whether or not it counts as an example depends on whether you believe that the act of coining the term is also the act of erasing its status as an "or" relation. Alternatively, if you're implementing a web browser, that distinction absolutely does exist because you need to know not to try to resolve an IP address as a DNS name.