Among Polya's four phases of problem-solving, the first one says that you have to understand the problem first, and these are some of the questions you should ask yourself:
"What is the unknown? What are the data? What is the condition? Is it possible to satisfy the condition? Is the condition sufficient to determine the unknown? Or is it insufficient? Or redundant? Or contradictory?"
I'm having trouble trying to figure out what "condition" means in this context, and what does a redundant or contradictory condition look like? I'm sorry if this doesn't seem like a worthy question, but I couldn't find the answer anywhere else and I really want to understand this.