Kind of a late response, but when you pick acorns you can dump them in water, the floaters are no good. A quick visual inspection of the sinkers is useful as some sink but clearly have too much damage to be viable.
Gardening in Montreal (indoors, urban, 6b) and the Laurentians (sandy to sandy loam, boreal forest, 4a)
Who among you feels worthy enough to be my best friend? Test 1 is to read this tiny ad:
It's a bit like "run away to the circus" but for gardeners