I also use those general rules to decide whether canned goods are safe. If I’m not certain it’s good, I won’t eat it. You’d be surprised, though, at how many people (especially younger ones) think that any canned food past the date on the can is inedible and must be tossed out.
My d-i-l is one.
Course, that really started after she ate an old container of yogurt that didn't look great. Her own fault. We warned her.
Now she's become the expiration date police.
That’s my kids. They’re all adults, but they think I’m the dummy. They have very little life experience in this regard. They know nothing about canning and preserving because I didn’t do that when they were growing up, but I was around my mom and aunts and we all helped out when I was growing up. It was all hands on deck in those days.