this post was submitted on 07 Mar 2025
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The USB law.
When you try to plug in a USB-A connector, there's a 70% probability it won't go in. Mathematically it should be 50%, but I don't believe that.
You switch it around, and there's a 30% probability it won't go in. This is not something they taught at school.
You switch it around the third time, and there's a 5% chance it still won't go in. Your mind begins to melt down, you switch and insert repeatedly until it finally works sooner or later.
USB Superposition
The orientation of the connector occupies both states at the same time. If you look at it, the superposition collapses into either of the two.
That's true only if you don't want to or cannot look at the connector. The side with the seam goes to the part of the hole with the plastic bit.
Shun the nonbeliever! ShunNnNnn!
That's cheating! You gotta wing it like a pro.
Also, the overwhelming majority of USB plugs have the logo on the side away from the plastic bit, and sockets have their plastic bits towards the top of the device. You want the plastic bits on opposite sides (as physical objects don't like to overlap), so that means that if you can feel the logo with your thumb, that side goes up when you plug it in, and you don't even have to look.
Amazing! I need to check how many of my cables actually follow this rule.
Also, the socket side tends to be aligned in a particular way, but it won't work with all manufacturers. I recall seeing some laptops that had their USB-A sockets upside down. Oh, and desktops too! Those sockets are usually vertical, and facing a wall, so it's anyone's guess which way is right.
Towards the back of the machine normally counts as up for upwards-facing sockets, unless it's a case with feet on the side, in which case it'll be away from those feet so the sockets would be the right way up if it were sideways and on the alternative feet.
It's the XCOM principle lol.
A shot with a 99% chance to hit will miss far more often than you think.
A shot with a 1% chance to hit will miss pretty much exactly as much as you think.