I'm surprised no left handed writer before the computer age tried to do a forward slash, found it doesn't work, and said "fuck it" and did a backslash
Also, when left-handed writing became accepted, there were special left handed pens (with a broader tip that you can push forward without it ‘biting’ into the paper)
Finally, how do you know nobody did that, and got harassed for writing incorrectly?
Left-handedness is somewhat associated with mirror writing (https://pmc.ncbi.nlm.nih.gov/articles/PMC2117809/:
“Particularly when produced spontaneously, mirror writing is a highly heterogeneous phenomenon: the mirroring may range from as small an item as a single reversed letter, through numerous reversed letters but not words, to thousands of pages of mirrored script; the place in the word in which a mirror letter occurs is variable, and numerals may or may not be reversed too”
its still a very unnatural action to do when writing, compared to a backslash
> Finally, how do you know nobody did that, and got harassed for writing incorrectly?
The parent asserts that it was invented for computer use, not beforehand. If a left handed person does it, its been invented beforehand
“What may be the first documented reference to the character is a 1937 maintenance manual from the Teletype Corporation, which includes a photograph showing the keyboard of its Kleinschmidt keyboard perforator WPE-3 using the Wheatstone system. In a 1945 document, Teletype used the name "diagonal key" for the symbol, and gives it a (non-standard) Morse code of ._.._ . Neither document gives its usage”
> If a left handed person does it, its been invented beforehand
I disagree. A left-handed person writing a slash in mirror image doesn’t write a backslash; they write a slash using a different glyph.
Except for writing, for everything else requiring skill he used his left hand.