Get all independence relationships in a DAG, among the observed variables
Examples
dag <- dhvm(caugi(V1 %-->% V2 %-->% V3 %-->% V4, U %-->% V2 + V4))
dhvm_list_independences(dag)
#> [[1]]
#> [[1]]$indep
#> [1] "V1" "V3"
#>
#> [[1]]$given
#> [1] "V2"
#>
#>