still people who are touch typists are able to find the characters faster on the keyboard than others. this message is written that way to test that out, in parts where it was possible.

however, in my case the blank keycaps did make the task a bit more difficult. i would write faster in cursive, and it might feel less effort.

also the reason was outlined:

> Allowing the use of (the fingers of) both hands would cause many unforeseen effects on the brain, which would make it hard to interpret the results.

btw, this post was quite frustrating to write.