What is a personal icraducian fallacy

There is a spelling error in your question, it should be "personal incredulity fallacy." The personal incredulity fallacy is a logical fallacy where someone concludes that something is false or incorrect simply because they cannot personally understand or believe it. This type of thinking is flawed because personal beliefs or lack of understanding do not invalidate evidence or facts. It is important to consider all available evidence and reasoning before coming to a conclusion.