post hoc (hŏk, hōk) adv.
& adj. In or of the form of an argument in which one event is asserted to be the cause of a later event simply by virtue of having happened earlier: coming to conclusions post hoc; post hoc reasoning.
[Latin, short for post hoc, ergō propter hoc, after this, therefore because of this : post, after + hoc, neuter of hic, this.]