post hoc, ergo propter hoc[pōst′ häk′ er′gō präp′tər häk′]
after this, therefore because of this: used in logic to designate the fallacy of thinking that a happening which follows another must be its result, and sometimes clipped to
Origin of post hoc, ergo propter hocClassical Latin
post hoc, ergo propter hoc - Legal Definition
After this; therefore because of this. An illogical notion that because one thing occurred after another, it must have been caused by the first thing.