Premise: There are many people sitting in a dimly lit room talking .
Correct statement: It is impossible that people are having a meeting about word peace .
Incorrect statement: It is certain that people are having a meeting about word peace .
Correct statement: It is impossible that some of these folks are bankers or lawyers .
Incorrect statement: It is almost certain that some of these folks are bankers or lawyers .
Correct statement: It is highly likely that they are in a room .
Incorrect statement: It is highly unlikely that they are in a room .
Correct statement: It is highly likely that people talking in room outside their own house
Incorrect statement: We doubt that people talking in room outside their own house
Correct statement: It is impossible that there are many people , in formal clothing , sitting around a large table , and talking in a dimly lit room .
Incorrect statement: There is a very good chance that there are many people , in formal clothing , sitting around a large table , and talking in a dimly lit room .