No: the point is that you DON'T need to know the other letters, as the brain will select the likeliest word given the context......although this can't continue for very long, as the context itself will become scrambled.
It's analogous to the way vision works, in that the brain will supply missing details from relevant previously stored optic input even if a locale has changed in the interim and only limited new 'real-time input' is available
(e.g. experimentally, by the use of a patch over one eye- depth perception will be restored by this method).
Which means you will trip over that bucket some fool has just placed on the lino........
Bugger !! Give us a hand up, then, you bastards.........
cambridge research
Re: cambridge research
"a harmless drudge, that busies himself in tracing the original, and detailing the
signification...."
signification...."