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We know is something is real if you can touch it, if you can see, it and if it is something that isn't imposable. We can't tell if the experience that we are having is real everything in the world can be fake but everyone just don't know it until they die and see what it is like to live a real life and not a dream or a fake life.

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We can tell what is real and what is false in a way that is explainable. We as humans tend to dream but we also tend to face reality in our lives. I guess the difference between the two is just common sense.

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We know that what is happening in the world is real because you can get the feeling (using our 5 senses) that its happening. You can feel that everything you're doing is real, and when you're dreaming you can sense that its a dream.

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You can tell things are real when you can feel things, like you can feel your emotions and use your senses.

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We can know that is real because we can just take a look at what is actually happening. Think about it. If we didn't have senses we would never know what is actually happening. It's like a dream. Except real and we go back to it everyday.

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We know if something is real in our world by using our 5 senses. I think that the most important sense for this specific question is feel, or see. There are some things that people see that others can't see (like an angel), so sometimes it isn't always your imagination! This is also based on your religion as well. You also have to think if what you see, feel, touch, taste, and smell is actually real.

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You know when is real when you can tough and feel and taste it but I don' think you want to taste it.

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We know something is real in this world because we live it everyday we see the people everyday and we do  things everyday we sometimes have the feeling when things are wrong or when they aren't real, we just have these feelings.

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We know when things in our world a real because we just have that sense sometimes if youre dreaming somwthing youll know if its a dream or not.

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We know when something is real when we use our 5 senses like hearing,smelling,seeing,touching,and tasting.

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We know when something is real in our world when you just have that gut feeling. We can tell everything is going on right now because we can process things through different sensations.

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We know if something is real by using our brain. Sometimes when it's a dream you would be able to tell if it's real or not.

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we know what is real because you can feel,or smell something.
we can tell that everything is right now is really happening because you can tell if you are in the real world or not.

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We know if something is real when we test it. We know that it is really happening because we can feel, smell, taste, see, and hear everything. Sometimes I think that an answer to this question might be based off of your religion.