Range of allowed values for the star-formation timescale (t_sf), defined as the time over which 68% of the star-formation happened, and the quiescence time (t_qu), defined either as the time spent with less than 1% (left) or 30% (right) of the peak SFR. The redshift at which the galaxy “quenched” is given on the top axis. The parameter spaces allowed for Jekyll and Hyde are shown in blue and green, respectively.The dark and light colored regions show the 68% and 95% confidence regions, respectively. The hashed region at the top indicates the part of the parameter space that would imply a formation before the Big Bang; such solutions were not explored.