▁been ▁described ▁as ▁follows : ▁ ▁Other ▁versions ▁of ▁the ▁par ado x ▁replace ▁the ▁death ▁sentence ▁with ▁a ▁surprise ▁fire ▁dr ill , ▁exam ination , ▁pop ▁qu iz , ▁A / B ▁test ▁launch ▁or ▁a ▁l ion ▁behind ▁a ▁door . ▁ ▁Log ical ▁school ▁Form ulation ▁of ▁the ▁judge ' s ▁announ cement ▁into ▁formal ▁logic ▁is ▁made ▁difficult ▁by ▁the ▁vague ▁meaning ▁of ▁the ▁word ▁" sur prise ". ▁An ▁attempt ▁at ▁form ulation ▁might ▁be : ▁ ▁The ▁prisoner ▁will ▁be ▁h anged ▁next ▁week ▁and ▁the ▁date ▁( of ▁the ▁h anging ) ▁will ▁not ▁be ▁dedu cible ▁the ▁night ▁before ▁from ▁the ▁assumption ▁that ▁the ▁h anging ▁will ▁occur ▁during ▁the ▁week ▁( A ). ▁ ▁Given ▁this ▁announ cement ▁the ▁prisoner ▁can ▁dedu ce ▁that ▁the ▁h anging ▁will ▁not ▁occur ▁on ▁the ▁last ▁day ▁of ▁the ▁week . ▁However , ▁in ▁order ▁to ▁reproduce ▁the ▁next ▁stage ▁of ▁the ▁argument , ▁which ▁elimin ates ▁the ▁pen ult imate ▁day ▁of ▁the ▁week , ▁the ▁prisoner ▁must ▁argue ▁that ▁his ▁ability ▁to ▁dedu ce , ▁from ▁statement ▁( A ), ▁that ▁the ▁h anging ▁will ▁not ▁occur ▁on ▁the ▁last ▁day , ▁implies ▁that ▁a ▁second - to - last - day ▁h anging ▁would ▁not ▁be ▁surprising . ▁But ▁since ▁the ▁meaning ▁of ▁" sur pr ising " ▁has ▁been ▁restricted ▁to ▁not ▁dedu cible ▁from ▁the ▁assumption ▁that ▁the ▁h anging ▁will ▁occur ▁during ▁the ▁week ▁instead ▁of ▁not ▁dedu cible ▁from