A contradiction is like when you say it’s both daytime and nighttime at the same time. You know how the sun shines during the day and the moon comes out at night? If someone says it’s both sunny and moonlit at exactly the same moment, that’s a contradiction because those two things can’t happen together.
Imagine you’re playing with blocks, and you have a block that is both red and blue at the same time. But when you look closely, you see it’s only red. Saying it’s both red and blue at the same time is a contradiction, because a block can’t be two colors at once unless it’s striped or mixed.
Think about when you’re hungry and someone offers you an apple. You say, “I want it,” but then you also say, “I don’t want it.” That’s a contradiction because you can’t both want and not want the apple at the same time. It’s like your tummy and your words are playing a tricky game of tug-of-war, where they can’t agree on what they want.