"Delusions are strongly held beliefs that can remain resistant to contradictory information, even when other people see the situation very differently. To the person experiencing the belief, it often does not feel like a possibility they are considering. It may feel obvious, urgent, personally meaningful, and supported by what they believe they are seeing, hearing, remembering, or noticing around them. This is one reason simply presenting more facts often does not resolve the belief. When a person feels certain that something is happening, attempts to disprove it can easily turn into a debate about evidence. The supporter points out an inconsistency, the person offers another explanation, the supporter introduces additional facts, and the discussion becomes increasingly detailed. What begins as an attempt to reassure can turn into a long argument about motives, timelines, who else might be involved, what particular events mean, or whether certain experiences “prove” the belief." More: https://www.authenticlivingtherapy.co/supporting-someone-with-delusions-the-leap-method-validation-and-healthy-boundaries