evidence: President Biden was in the early stages of his interview with special counsel Robert K. Hur when the topic of Beau Biden came up — initially with Biden raising it and later as Biden was attempting to get his chronological bearings and wondered aloud when, exactly, it was that his son died. [...] The exchange between Biden and Hur has become one of the focal points of a lengthy interview over two days in October that led the special counsel to conclude that Biden would not be prosecuted for mishandling classified documents — in part because Biden’s "poor memory" would make it difficult to convince a jury. [...] A Post review of the complete 258-page Hur transcript, which is expected to be provided to Congress on Tuesday morning, paints a more nuanced portrait of the exchanges between Biden and the special counsel. Biden doesn’t come across as being as absent-minded as Hur has made him out to be — and Hur doesn’t appear as crass as Biden has made him out to be.