Bingo! "A/B testing" aka completely randomized design: https://www.itl.nist.gov/div898/handbook/pri/section3/pri331.htm https://www.itl.nist.gov/div898/handbook

Bingo! "A/B testing" aka completely randomized design: https://www.itl.nist.gov/div898/handbook/pri/section3/pri331.htm https://www.itl.nist.gov/div898/handbook/pri/section3/pri331... Mountains can be moved with randomized control trials.