I want to know the answer to the following question:
What aren't considered valid when performed by other denominations?
All the background I'm provided with is that "Individuals undergoing baptism must affirm publicly that dedication and baptism identify them "as one of Jehovah's Witnesses in association with God's spirit-directed organization," though Witness publications say baptism symbolizes personal dedication to God and not "to a man, work or organization.". Is that enough to answer the question?
Answer: no