By exist, do you mean have to be sentient and tangible? Abstract ideas like love and justice are considered real. People deny Bigfoot's existence, but he is still considered real since he is in our minds and before us. But reality is such a debatable, fickle thing. Nothing could be real.
But thing that are not realer are much more present than people. Who do you think is more real (if our attention makes it real) Abraham Lincoln, or James Bond?
No. Logicly, it doesn't nessaserally have to exist to be real. Look, cartoons don't exist but there still logicly real. Sometimes, real things come from your own imagination. This is a good question that can not be explained throughly, but as my grandad tells me, "Ask me the question, If I can't answer it ask the teacher. If the teacher can't answer it, ask the libraryian. If they can't help you, it's a good question."
Well, for something to be real in the PHYSICAL realm, it must exist. But then again...what context do you mean by 'real' and 'exist'. For something to be 'real', does it have to be composed of physical matter that we can see, smell and touch? Give meh more infoooo!
Interesting question. The short answer whould be no. Everything is in our minds. What might not exist for someone might exist for someone else. (Religion is a good example.) But again, that's just the extremelly short answer.
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