Canny? That's uncanny!

Factual Questions
1

Is it an “uncanny resemblance” or a “canny resemblance”?

What is canny?

2

canny (adj):

  1. cautious and shrewd
  2. wise and well-informed

uncanny (adj):

  1. mysterious and eerie, weird
  2. so good, acute, etc. as to seem preternatural
3

Canny is related to ken, knowledge. An uncanny resemblance is one that is beyond knowing or understanding how it could be such a close resemblance.