As Dweck puts it: “There is nothing in the growth mindset that prevents students from deciding that they lack the skills a problem requires. In fact, it allows students to give up without shame or fear that they are revealing a deep and abiding deficiency.”
Acknowledging weaknesses as part of the growth mindset: assumption that identifying a weakness isn’t a failure, but a learning process and signal to move on to something else aligned with your strengths. To be able to admit failure, learn from the effort, and move on is the growth mindset.