I was taught to use two, and still do out of force of habit. I almost cannot help it. My muscle memory is trained to double-tap the spacebar after a period when writing prose.
Of course, I also was forced to learn to type on these ancient computers with the keyboard attached directly to a printer, with no CRT and no CPU, that only ran a word processor and had to be corrected with a little bottle of paint.
Of course, I also was forced to learn to type on these ancient computers with the keyboard attached directly to a printer, with no CRT and no CPU, that only ran a word processor and had to be corrected with a little bottle of paint.