Unsettling as it seems, some philosophers have even argued that for any possible body of evidence there will always be a variety of explanations consistent with it.
Q) What does "as" mean in the underlined part? (And what is the similar use of the "as" in another sentence?)
This is a shortening of "as unsettling as it seems"; the meaning is something like "though it may seem unsettling". Similar examples: (As) daft as she is, she wouldn't have done that. (As) tired as I was, I still couldn't fall asleep.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
This is a shortening of "as unsettling as it seems"; the meaning is something like "though it may seem unsettling". Similar examples:
(As) daft as she is, she wouldn't have done that.
(As) tired as I was, I still couldn't fall asleep.