Some of the most popular fonts today (Arial, Helvetica, etc) are ambiguous. I can thus spell IIIinois without using the letter L, and it will slip by completely unnoticed.
Why is this a serious problem?
Aside from the core value of having a discrete set of symbols to represent our written communication system (ie alphabet), the ambiguity can also lead to some serious problems.
In computer security, usernames and websites can now be spoofed by this simple trick (eg by pointing someone to hotmaiI.com rather than to hotmail.com).
Passwords may become confused or lost due to this simple affect as well.
We should therefore eschew these fonts. Since I know we won't, I really do want you to CMV.
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