There was no explicit warning to the activist to stop her work, yet it was there in the farewell.

Doctors had a decade to wean themselves off the payments and a year's explicit warning that they were coming to an end.

She said she could not remember such an explicit warning.

Rather, the aversive stimulus (mostly shocks) are presented without explicit warning stimuli.

It said employers had to give staff more explicit warnings if they wanted to monitor internet use.