Yes you have to do something: choosing a new door - but it can be the same. Do you get me? The action of making a new choice is either visible if you are choosi

Yes you have to do something: choosing a new door - but it can be the same. Do you get me? The action of making a new choice is either visible if you are choosing a new door, but you can also say that you are making a new choice by choosing the same door. By the way, it is simpler: the probability the door you've choosen at first hide the car is just increasing when the host is eliminating one. You don't have to do something for that.