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)
This secret army of atomic robot zombie men answers only to this tiny ad:
Contemplate spending the next 20 years puttering in permaculture projects