Phenomenology is the philosophical study of observed unusual people or events as they appear without any further study or explanation.  Some things have no explanation, this is for that place. There is a phenomenon of clinical delusions as well. Although the nature of delusions is controversial delusions are often characterized as strange beliefs that appear in the context of mental distress. Indeed, clinical delusions are a symptom of psychiatric disorders such as dementia and schizophrenia, and they also characterize delusional disorders. Yet just cause they say something doesn't mean we should believe it. Believe what you believe and say what you say is real.