I want to ask you guys about the interpretation of Quantum Mechanics. I am using Griffiths' Introduction To Quantum Mechanics as a textbook. In this book, on chapter 1.3, there is an explanation about 3 different views of quantum mechanics, realistic, orthodox, agnostic. My homework question is Explain the followings briefly, based on the realist, orthodox, and agnostic positions respectively. 1. Where was the particle just before the measurement? 2. What happens if we made a second measurement immediately after the first? 3. What would be the probability distribution for an ensemble of states prepared with the same initial condition? Compare the three positions. My problem is on the third question. 1 and 2 is just on the textbook so I have no problem with them. However 3, I am not very sure. In my opinion, answer is this. realistic : Probability distribution looks like a delta function since the states are all the same. orthodox : Probability distribution will be widely. agnostic : Refuse to answer about it. I actually have no logic for the answers. Can anyone help me about this question?