Invisible Pink Unicorn is a parody religion that highlights arbitrary and unfalsifiable nature of religious belief similar to Russell's teapot which asserts that people must provide proof for a belief instead of others proving otherwise..
Russell's teapot is an analogy, formulated by the philosopher Bertrand Russell (18721970), to illustrate that the philosophic burden of proof lies upon a person making unfalsifiable claims, rather than shifting the burden of disproof to others. 
