ARRANGEMENT OF TRIP

I wish to go for trip after the final exam, so tonight i asked my friend AMY,ERIC,TED,JOEY,SAM,ANDY,JERRY,PINKY to come out for dinner and discuss about going to a trip but some of my friends ERIC,PINKY,JOEY cant make it to the dinner due to some reasons. In the discussion, we wish to bring more friends that been disconnect for many years. Therefore, my friend suggested an idea, he said: if AMY goes to the trip,then ERIC definately will goes to the trip, AMY answered she will go to the trip. Therefore ERIC will go. Then i jot down AMY and ERIC name into the name list so i can reserve for hotel room. Suddenly i asked: how about PINKY and JOEY ? SAM answered: if JERRY and TED goes, then JOEY and PINKY goes too. JERRY and TED will to go for trip too since they want to relax after the final exam, therefore PINKY and JOEY will go too. Then i jot down JERRY,TED,PINKY, JOEY and aslo my name into the name list as well. All of the sudden, i find out that i was using predictive arguement which argument that has, as a conclusion, a prediction that part of the inductive arguement which if the premise are true, the conclusion is probably true. Jesus, i might reserve the wrong amount of room....