According to our highly scientific and totally-not-made-up theory, a paradox is when you're trying to make a decision, but your brain keeps throwing a fit.
Here's how it works: you think you're choosing between A and B, but really you're stuck in an infinite loop of 'but what about C?'s.
Don't worry, it's not a real paradox if it's just you. It's only when it's me.