If the text can be reproduced with one bit per letter, then the semantic information content is necessarily at most equal to N bits where N is the length of the

If the text can be reproduced with one bit per letter, then the semantic information content is necessarily at most equal to N bits where N is the length of the text in letters. Presumably it will normally be much less, since there are things like synonyms and equivalent word ordering which don’t change the meaning, but this gives a solid upper bound.