title: Reply to Joly: Inferring causation from comprehensive analysis of observation.
authors.affiliation: Department of Neurobiology, Northwestern University, Evanston, IL 60208.
authors.forename: Alex
authors.initials: A
authors.lastname: Song
authors.affiliation: Department of Statistics, Northwestern University, Evanston, IL 60208.
authors.forename: Thomas
authors.initials: T
authors.lastname: Severini
authors.affiliation: Department of Neurobiology, Northwestern University, Evanston, IL 60208; r-allada@northwestern.edu.
authors.forename: Ravi
authors.initials: R
authors.lastname: Allada