was forced to stop using the imagery. Controversy about deceiving children Psychologists generally differentiate between telling fictional stories that feature Santa Claus and actively deceiving a child into believing that Santa Claus is real. Imaginative play, in which children know that Santa Claus is only a character in a story, but pretend that he is real, just like they pretend that superheroes or other fictional characters are real, is valuable. Actively deceiving a child into believing in Santa Claus's real-world existence, sometimes even to the extent of fabricating false evidence to convince them despite their growing natural doubts, does not result in imaginative play and can promote credulity in the face of strong evidence against Santa Claus's existence. Children will eventually know that their parents deceived them. Various psychologists and researchers have wrestled with the ways that young children are convinced of the existence of Santa Claus, and have wondered whether children's abilities to critically weigh real-world evidence may be undermined by their belief in this or other imaginary figures. For example, University of Texas psychology professor Jacqueline Woolley helped conduct a study that found, to the contrary, that children seemed competent in their use of logic, evidence, and comparative reasoning even though they might conclude that Santa Claus or other fanciful creatures were real: Woolley posited that it is perhaps "kinship with the adult world" that causes children not to be angry that they were lied to for so long. Austin Cline argued the problem is not with length, but with a complicated series of very large lies. Typical objections to presenting Santa Claus as a literally real person, rather than a story, include: that lying is normally bad, that parents intentionally lying to their children promotes distrust, that it promotes selfishness, greed, and materialism, that it associates good behavior with being materially rewarded with presents from Santa Claus, and that tricking children into believing falsehoods interferes with the development of critical thinking. With no greater good than having some fun, some have charged that the deception is more about the parents, their short-term happiness in seeing children excited about Santa Claus, and their nostalgic willingness to prolong the age of magical thinking, than it is about the children. Philosopher David Kyle Johnson wrote, "It's a lie, it degrades your parental trustworthiness, it encourages credulity, it does not encourage imagination, and it's equivalent to bribing your kids for good