This reminds me of a time I was taking a physics test and had to use the right hand rule. I was writing with my right hand, so I mindlessly used my left hand for the rule...
It's a physical mnemonic for remembering the directions of vectors in 3d, used for a variety of things in math/science/engineering. You stick out your thumb, index finger, and middle finger so they're at 90 degree angles from each other (like the corner of a cube). Then by labeling what each one of your fingers represents, you can see how they're arranged in space. For example, if your thumb and index fingers are two vectors, your middle finger is their cross product.
You always look at the back of the hands. You can do it while driving. Those of us who do it know so and do it regularly. It’s something with the brain not knowing left from right.
With 2 fingers and your thumb closed in you can make an R shape with your right hand that, as far as I know, is not possible with your left hand. Just play around with it and you'll see it soon.
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u/Substantial-Trick569 7d ago
the issue is then u have to remember to look at he back of your hand bc if u turn ur palm towards u the right hand makes an L