The use of factual/counterfactual comparisons—that is, estimating the difference between what actually happened and what would have happened absent an event—is a fundamental tool in the economists’ ...

(Phys.org)—In the non-intuitive quantum domain, the phenomenon of counterfactuality is defined as the transfer of a quantum state from one site to another without any quantum or classical particle ...

An icon in the shape of a lightning bolt. Impact Link In a way, it seems like there's no point wondering what could have been — if you hadn't screwed up that job interview, if you'd worked up the ...

How many times have you wondered about the proverbial “Road Not Taken” and tormented yourself with fantasies of how much better things might have been had the younger you made different decisions? Or, ...

Watercolor of the sinking of the Lusitania by the Germans in 1915. In a 1963 episode of "The Twilight Zone," a theoretical physicist travels back in time and attempts unsuccessfully to change the past ...

A new kind of machine-learning model is set to improve automated decision making in finance, health care, ad targeting, and more. A new kind of machine-learning model built by a team of researchers at ...