[John Hodgman, writer, actor, and comedian, fills in for Jesse Thorn for this interview. Hodgman was invited to write the profile for GRRM for the TIME 100, and has previously spoken about his appreciation of the series and Martin's efforts, as well as referenced these things on The Daily Show.]
[NOTE: This is from private correspondence without the usual header information we use to verify. However, a screenshot of the message can be seen here, with the name of the respondee redacted.]
Who would win in a fight, Barristan Selmy or Arthur Dayne (in their best days)?
Dayne... if he was armed with Dawn.
If both men had equivalent weaponry, it might be a toss-up.