To rebut something means to argue against it with evidence or reasoning that shows why it's wrong. When you rebut a claim, you provide specific reasons and facts that counter what someone else has said, going beyond simple disagreement to make a reasoned argument.

Imagine your friend claims that electric cars are worse for the environment than gas cars. You might rebut this by explaining that while making batteries does create pollution, electric cars produce far less pollution over their lifetime than gas cars do. You're presenting actual information that challenges their argument with logic and evidence.

In a debate, skilled debaters constantly rebut each other's points. A lawyer rebuts the opposing attorney's arguments in court. Scientists rebut flawed theories by showing why the evidence doesn't support them. The key element of a good rebuttal is that it directly addresses the other person's argument with logic and facts, not emotions or personal attacks.

When you rebut effectively, you show that you've listened carefully and that you can think critically about what you've heard.