2. In answer to your question pseudoscience is often either impossible to test or excuses are made which keep it from being tested.
3. In some cases when evidence does not support the claim, instead of abandoning their ideas, pseudo-scientists add conditions to their theories or explain away the evidence so that it is impossible to test the claim empirically.
4. For example a psychic who cannot demonstrate mind reading or other psychic feats under carefully controlled conditions in the laboratory might claim that “the skeptical vibes of experimenters” are blocking his or her psychic powers.
5. In other cases pseudoscientific theories cannot be tested right