An annual plea to people who buy corn from farmstands.
Too many people rip perfectly good ears of corn open and throw it back on the pile. I was trained from my earliest years that this was profoundly rude, akin to taking a bit out of fruit at the market and putting it back, because it accelerates the drying and starching of the violated ear of corn.
You can tell a lot from just looking at and feeling the unopened ear. A lot. I never open an ear of corn, and though I buy a half dozen ears of corn virtually every week of the season, on average I get maybe one or two ears with some weirdness per season. And I have been doing this for at least 15 years running. Buy an extra ear if you are worried, but don't spoil the corn for everyone else, please.