When the jurors can't agree, for whatever reason, you get a hung jury.
A judge needs cause to remove a juror. This includes a juror refusing to deliberate. In the specific case you bring up, it would be hard to prove that the juror is refusing to deliberate (i.e. "not being forthright") compared to just differently interpreting the facts of the case or the law or disagreeing with how the law should be applied.
It is the purpose of voir dire to weed out jurors with a preexisting bias in the case. You don't want to remove jurors after the case has started, as you run the risk of running out of alternates (there are probably state specific laws on how to handle this without requiring a mistrial though).
A judge needs cause to remove a juror. This includes a juror refusing to deliberate. In the specific case you bring up, it would be hard to prove that the juror is refusing to deliberate (i.e. "not being forthright") compared to just differently interpreting the facts of the case or the law or disagreeing with how the law should be applied.
It is the purpose of voir dire to weed out jurors with a preexisting bias in the case. You don't want to remove jurors after the case has started, as you run the risk of running out of alternates (there are probably state specific laws on how to handle this without requiring a mistrial though).
https://en.wikipedia.org/wiki/Hung_jury