"Quid est veritas" is a Latin phrase that means "what is truth." It's a philosophical question that people have been asking for a very long time. Imagine you play a game of hide and seek with your friend, and your friend tells you he's hiding behind a tree. Is that true? Well, you won't know for sure until you actually look behind the tree. Sometimes, what people tell you is true, and sometimes it's not. This is what people mean when they talk about truth. It can be tricky to figure out what is true and what is not, but it's very important to try to know the truth so that you can make good decisions.