Back decades ago when I was in graduate school (thus having a bachelor's degree, having negotiated the SAT and the GRE, having made it through umpty English classes and at least three writing classes, and so on) I started accidently spelling "consider" as "concider." No excuses. My mind just got confused and that's how I was spelling it for a time. I made the mistake in a serious paper for my advisor. I was in his office when he pointed it out. He said, "think of it as con-sider." To which I replied, "How do you spell cider?" To which his jaw dropped and I got no reply.
Yep, I'm dyslexic, but it ain't my fault English spelling is such a mess.
Yep, I'm dyslexic, but it ain't my fault English spelling is such a mess.