compute_necessity(): compute whether X was necessary for Y in the actual world.

We check whether intervening on X in the actual world flips the value of Y.

Usage

compute_necessity(x_var, y_var, causal_model, actual_world)

Arguments

x_var

Character string giving the candidate cause variable.

y_var

Character string giving the outcome variable.

causal_model

A named list of structural functions defining the causal model.

actual_world

A named list giving the values of variables in the actual world.

Value

A logical value indicating whether the candidate cause is necessary for the outcome in the actual world.