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Loophole (Score:2, Insightful)
Therefore, the characters that crossed over could have been based on the real people the child knew or had observed.
Re:Loophole (Score:1)
If those crossovers never happened and aren't referenced in any way, shape, or form by the rest of the series in question, then it could be argued that somehow it was a daydream. But a character from St. Elsewhere (assuming that it was really meant to be whole cloth fiction) showing up on another series pretty much means either that episode (and, usually, that means the series) is part of the dream or else it's not part of the series.
Of course
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