What is the weirdest argument you’ve overheard?

Not one I overheard but one were I was overheard. In Paris at a restaurant where my girlfriend and I (anglophones) commented on the couples baby beside us. She said it was such a cute baby. I countered the most babies are cute so it should go without saying. You really only have to comment when they are butt ugly like in Seinfeld. It was a fun discussion which made us both laugh. Mid meal the couple got up and said in English that they enjoyed it too.
- That’s kind of wholesome :)
- 🎶 Damn that's an ugly baby 🎶

I got involved in a argument between two older people about whether the earth rotated or not.
The very strange thing is that after I confirmed to them that the earth did indeed rotate and that is why the sun would rise in the east and set in the west, that was the end of the conversation and they thanked me and moved on.

"it was an awkward gesture or autism or someting..."
- I have a friend who said "misunderstood autistic billionaire"
  They use xitter on a daily basis and apparently just write off all the pro Nazi content
  
  Your friend might be a Nazi.
- What the heck?

I was walking through one of the dodgier parts of my city fairly late at night with not too many people around. I could see these 2 drunk weirdo guys with a kind of homeless vibe. There was an older guy and a younger dude, sitting on a bench, I could hear the older guy. Imagine this with a thick crocodile Dundee Aussie accent.
"I don't believe it, I CAN'T believe it, after all I've done for you. I was nice to you. I bought you cheese, I... ... ..."
An awkward 4 to 5 second silence followed as it slowly dawned on the older guy that his list of benevolent acts only had 1 item before he followed up with
"I bought you CHEESE mate!"
- The nerve of that guy’s friend… he bought him CHEESE!
- This is so real.

Not an argument but I once heard my neighbor casually (but loudly) discuss with someone how she could only orgasm anally
- she was just letting you know.
  
  "I have an open ~~back~~door policy" - op's neighbour.
- So… is she single?
- Hey, don't judge.
  
  I'm not hear to kink-shame. It was just surprising to overhear

If specific people existed when they where right in front of them existing. Those people are LGBT people and it's happening to much.
- What a stupid argument indeed. 😓 I knew someone who told their friend, TO MY FACE, that non-binary people don’t exist. I guess I’m not real.
- Also, are you perchance plural? So are we :)
  
  Shouldn't that be "So are we"?
  
  Yes I am.. We are. I use I instead of we because people don't understand it and it's easier in online spaces to just use I instead of we.

Not one that I overheard but one that I was involved in:
I said that I didn't like bright yellow. This apparently was extremely offensive to the friend I was dating at the time and he had to convince me that I was wrong and there is no room for opinion on the matter of color preferences.
- A coworker insisted that preferring a silver- colored phone over a black one is racist.
  
  I don't know where people come up with these things.
  
  I'm curious what your neighbor thinks about a nice tie-dye?

I was in Spain, waiting outside a tournament venue for Magic: The Gathering. Two guys were talking, presumably in Spanish. I knew no spanish, but I could tell the one guy was really excited, almost choking back a laugh while speaking quickly and loudly before he held out his hand vertically, swung it left and right like a table tennis paddle while loudly exclaiming "RAGARAGARAGARAGA".
The other guy was listening closely with a completely unfazed expression.
Their conversation continued.
At that point, I started to wonder: what were they talking about? What kind of conversation could lead to that motion and that complimentary sound to be adequate? Why was the other guy seemingly so unamused when the first guy was so excited?
This happened probably around 10 years ago, and it bothers me to this day. I will never know for sure, of course, but I have yet to think of a single topic which could reasonably prompt that interaction.
- Maybe the one guy was just telling the story of how he overheard someone with a ping pong paddle saying RAGARAGARAGARAGARAGARAGA

Is a hot dog a taco? Heard that one at dinner tonight.
- A hot dog is 100% a taco. The real debate is whether or not a hot dog/taco is a sandwich.
  To answer this, you first need to solve two other questions: First, what would you consider to be bread? Second, whether a sandwich requires two separate pieces of bread. Is a wrap a sandwich? Most would consider a tortilla to at least be a form of bread, but it’s only one piece. A gyro, made with flatbread? What if it’s one solid piece of bread that is totally sealed, like a hot pocket, calzone, or Asian dumpling? Is dumpling considered “bready” enough to count? Or do we not count it because it’s not leavened?
  And that brings us back to the taco argument. Do we consider a taco a sandwich? If we consider a wrap a sandwich, I would argue yes. Because the only functional difference between a taco and a wrap is how big the tortilla is. And if a taco is a sandwich, then a hot dog would also be considered a sandwich.
- There are some questions that make you think. Is a hot dog a sandwich? Does a toilet paper roll have 1 or 2 holes? Is a cereal bowl with milk a soup?
  Then there are some questions that kill your brain. Is a hot dog a taco? Wtf?
  
  A toilet paper roll is topologically a torus, which has one hole, so that's easy. The other ones though...
- I've never heard that one, but I have heard people argue for a hot dog being a sandwich.
  
  https://cuberule.com/
- A hot dog is a sandwich.

"Look man, all I'm saying is that if it wasn't for that song most people wouldn't even know how to spell bananas".
- bananananana*
  *Nanny Ogg knew how to start spelling “banana,” but didn’t know how you stopped.

Whether the Newport Jazz Festival was in Europe, because she knew it was in Europe, because that's the only time she'd been to Europe.
Difficulty rating: we were within 100 miles of Newport, Rhode Island, at the time. 2 hours in a car.
- Rhode Island is Europe, right?
  
  Maybe soon they'll annex, but currently no. RI might hope.

I had an argument with my partner that they got to sit in bed on their phone for 10 minutes while I had to get up and care for the newborn. They were paying bills. I was still jealous. The argument ended with us both agreeing we were tired and would send the kid to daycare and nap.

that we should worry about the feelings of Nazis.
- Make nazis Afraid Again

I speak Russian due to having lived under Soviet occupstion and constantly overhear Russian tourists while traveling in Asia and honestly I wish I couldn't understand because they argue over the dumbest shit. Now I'm in Thailand and the theme is price measuring everything down to the cents. I've heard several loud arguments over whether a thing is cheaper here than at home etc it's so weird. I get that Russia is going through an economic crisis but why you're traveling at all then.

I don't remember the specifics of it, but I do remember overhearing two people arguing about a video game that I was super into at the time while having breakfast at an ihop, and neither of them knew what the fuck they were talking about.
If I was an extrovert, I would have been compelled to interrupt just to correct both of them. Instead, I posted about it to Reddit.

Not exactly an argument, but I once overheard a restaurant owner bribing a cop. It was an Italian restaurant in San Francisco. Kind of unsettling, but the food was great, and reasonably priced. 4 stars.

“Grandpa, Israel isn’t a state, it’s a country!”
This was a woman in her 20s, if I had to guess
- I don't think that's weird. A lot of people don't know that "the state" means "the country" unless you are specifically talking about individual states within a country. I can see how that could be confusing for somebody who doesn't know better.
  I'm reminded of when I was in like 8th grade or something and I was confused about how the UK can be a country but England and Scotland and Wales and Northern Ireland are also countries. Similar concept.
  
  It’s a uniquely American problem because all those stupid states had to unite

Overheard on a game chat recently. Two guys arguing whether 100 guys could take on a silverback gorilla. One of them insisted that silverbacks have impenetrable skin lol.
- armed?
  human's technology is our evolutionary advantage. a single human- even a weak one- could kill a gorilla if it had an appropriate rifle or shotgun.
  unarmed? dude might have a point... I'm not sure a hundred people could fight a gorilla at the same time.
  
  Unarmed lol
  
  They have way more strength muscle and much less endurance muscle. 1v1 x50 followed by 5v1 might work

I was sitting in a restaurant, when the people on the next table discussed how to suppress certain topics from a minister-level EU meetings, as one person wanted to delay any action on that. The discussion also involved passing an envelope, and the one person covering the rather substantial bill.

best way to prepare toilet paper before wiping: folding, crumpling, or rolling
- There is no argument to be had.
  Folding. It's the most economic, efficient and way more scalable with thinner sheets of toilet paper as well. People who crumple are on the same level as kids from kindergarten.
  So wtf is rolling? You roll it around your entire hand and wipe? That has to be the worst way to do it unless you had explosive diarrhea.
  
  You roll it around your hand for shape, then remove it. It’s essentially the same as folding, unless you leave it on your hand, in which case you’re wasting half of it.
- Rolling???
- It depends.