Excellent post, Kerry even lied about using the word Liar about Bush, said it was too harsh a term. Is that what it means to use nuance?
If Kerry ran as claimed in 1982, according to one of the earlier statements (the sentence from 2002 that says "20 years ago"), it was one of the years when 2:50 was required.
Not only was the time difficult, but you had to have run it sometime from the beginning of the previous calendar year until about March 1 of the current year. You don't get a lifetime pass if you just did it once a couple of years earlier.
So his qualifying time period would have been 1/1/81 to 3/1/82. This further limits the realm of possibility.
Can't resist: Anyone who has finished Boston (especially just once) has their finish time SEARED....SEARED into their memory.