I don't think these two forms of'amnesia-induced' typos are so different. "Typos" happen quite often, especially when typing on a smartphone and selecting the w

I don't think these two forms of'amnesia-induced' typos are so different. "Typos" happen quite often, especially when typing on a smartphone and selecting the wrong character. And people learn to read it correctly. It's sometimes used intentionally, e.g. 歪果仁.