Can anyone explain how removing letters from a sentence increases it's (total) entropy? Edit: Okay, I can sort of see how it can increase entropy. Replacing ch

Can anyone explain how removing letters from a sentence increases it's (total) entropy? Edit: Okay, I can sort of see how it can increase entropy. Replacing characters with 'nothing' randomly does give some extra entropy, although you lose some as well (especially if you overdo it). Seems like it would be best to randomly remove about half of them, although that's also difficult to remember, and only adds 1 extra bit per character (assuming no entropy is otherwise lost). Overall I'm still not convinced.