"Only if it turns out that reality is actually nothing more than a holographic illusion created by the interplay of subatomic particles on a vast two-dimensional membrane."
This article covers a subject that has been deemed non-canon by either the author or the Back to the Future licensees, and thus should not be taken as a part of the "real" Back to the Future universe.
"Problem is we won't be able to show it to anybody."
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He was teaching a history class on the first Monday in March, 1986 when a delivery man from Western Union arrived with a letter written in 1893 for one of his students, Marty McFly, with instructions that it be delivered to Marty on that day at "the highest attainable level of education prior to university".
The teacher told Marty to restrict his mail deliveries to his home address, but the letter deliverer mentioned that his supervisor at Western Union experienced a case like this when he was young.
