Biased Sample

Also known as foundational bias. In this fallacy you are biased towards a certain conclusion before making arguments or looking at the evidence. It's not based on logic or science but rather on personal preference and preconceptions

Examples:

• "No one can convince me"

• "There's no way you can prove to me"

Anyone with this kind of closed-minded stubbornness can hardly be trusted because this opens the way for all logical fallacies easily without second thoughts even if it looks very fallacious and obvious to an objective observer the people arguing with biased samples would find a hard time solving it. This isn't the way an argument should tend to, for a real skeptic demands to be convinced with evidence, it's important to note that opinions are meaningless in the face of evidence