Statement: The Principal instructed all the teachers to be careful in class because some students may disturb the other students.
Assumptions:
I. The teachers will handle the situation properly and they will point out the naughty students.
II. The students will welcome the decision of the Principal.
If both I and II are implicit
Clearly, teachers have been instructed to maintain discipline in the class and point out the naughty students who do not let other students study. So, I is implicit.
Besides, the implementation of the instructions would surely help good students to concentrate on their studies and ensure a good working atmosphere in the class. So, II is also implicit.