Do I have any hope left?

AFAIK the Literacy score ever worked this way (even on Vanilla/G&K), i.e., representing the percent of the tech tree you already know. I may be wrong, but I don't remember ever being able to steal techs when nº 1 on Literacy.

You can still steal techs when no. 1 in literacy; you could have 5 techs a civ doesn't have, but if that civ has just 1 that you don't have, you can steal it.
 
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