Factual errors: About 12 minutes into the movie before Irving is to meet with McGraw Hill, there is a southerly view of Manhattan with the Empire State Building in the foreground. In the distance looking toward lower Manhattan are the buildings of the World Financial Center. These buildings did not exist in 1971. Also, in 1971 the Twin Towers of the World Trade Center would be visibly under construction albeit not very tall at that time.
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