How is something true and real?

Knowing that you have taken a philosophy course, someone asks you the question, "but how do you KNOW that something is true and real?" Rather than being trapped into an "answer," be smart and give the person some alternative ways of "KNOWING." Mention the philosophers in Chapter 5 as you talk about their theories as you try to convince your friend that they have something valid to offer.
You ask, "How do you KNOW that something is true and real". Well that would depend on how you perceive something to be true and real. Just because you can see an apple, is it sufficient to believe that it…