Which ability would you lose?

Speak no evil. hear No evil. See no evil
Ever since I wrote Principessa, where Portia had to solve a case while not speaking the native language (it was almost entirely set in Italy) I’ve thought about writing a casebook where my sleuth has to compensate for losing an ability.
The obvious ability to take away from her would seem to be sight, as a lot of her inductive observations are visual, but maybe that is too easy a choice.
What do you think? Which ability shall I deprive my heroine of (temporarily, though she will not know that) for my next casebook?<a href="https://polldaddy.com/p/7282505" target="_blank">Take Our Poll</a>