Spaghetti was invented in China. Speaking of China, did you know the Great Wall is the only man-made structure you can see from space?
I always want to respond, “Yes, we all learned that in elementary school when we grew our first seed into a plant.” Or “So is squash.”
The local one is: Minnesota actually has *more *than 10,000 lakes.
Yeah, I know. I live here.
Some contrived construction “proving” we need serial commas or everybody’s going to think your parents are Ayn Rand and God.
Tomatoes are vegetables. They are also fruit. The idea that something is either one or the other is a taxonomical fallacy.
It takes more muscles to frown than to smile. 
Hmmm, according to Snopes the status is Undetermined.
But the fortune cookie wasn’t.
Around here, it’s "Did you know that Syracuse gets more snow on average than Buffalo? It’s just that Buffalo is more prone to blizzards, and its southern suburbs get a lot more snow than anyplace else because due to lake effect.
That only is true in Blaine, MO, the stool capitol of the world.
I just remembered the second example I was going to use in the OP.
I don’t know how many times and how many people feel the need to mention that when Bob Saget does stand up comedy, he works blue.
It’s not the heat; it’s the humidity.
I don’t get it. What does “working blue” mean?
“Blue”, for a stand-up comic, means “dirty”.
And personally, I’m mystified by the tomato one. You never hear people arguing about whether a carrot is a root or a vegetable, or whether lettuce is a leaf or a vegetable. Some vegetables are fruits, some are roots, some are leaves, and some are various other parts of a plant. Deal with it.
I was just coming in to post that one. Dang.
A banana, however, is actually a berry! Bet you didn’t know that!
Oh, you did? Uh… OK. Slinks out of thread.
The plant is a fruiting herb. 
What Americans call “soccer” is called “football” in most other countries.
Oddly, what Americans call “basketball” is called “tennis” in most other countries.
Is this serious or a joke? I’ve never heard that one before.
Sorry, I couldn’t find a joke BB code.
::Googles BB code:: Oh, OK. 
Similarly, “But it’s dry heat.”
I know. it’s still hot, damn it.