Premise: An orchestra of about 30 people are practicing on the stage of what appears to be an auditorium full of green chairs .
Correct statement: It is almost certain that an orchestra practices for their performance .
Incorrect statement: There is almost no chance that an orchestra practices for their performance .
Correct statement: It is probably the case that a couple of people in green chairs watch an orchestra practice .
Incorrect statement: It is impossible that a couple of people in green chairs watch an orchestra practice .
Correct statement: Chances are slight that an orchestra prepares for their opening night show .
Incorrect statement: It is likely that an orchestra prepares for their opening night show .
Correct statement: It is impossible that the Rochester , NY Philharmonic practicing before opening night of their 2014 orchestral season .
Incorrect statement: It is almost certain that the Rochester , NY Philharmonic practicing before opening night of their 2014 orchestral season .
Correct statement: We believe that an orchestra of about 30 people are happily practicing .
Incorrect statement: It is improbable that an orchestra of about 30 people are happily practicing .