Premise: A man with a shaved head and a button-up shirt looks into a microscope near a poster about red blood cells .
Correct statement: There is a better than even chance that a man with a shaved head , wearing glasses , is looking into a black microscope .
Incorrect statement: Chances are slight that a man with a shaved head , wearing glasses , is looking into a black microscope .
Correct statement: It is impossible that a scientist studies a vaccine .
Incorrect statement: It is certain that a scientist studies a vaccine .
Correct statement: There is a better than even chance that a man wears a lab coat .
Incorrect statement: It is highly unlikely that a man wears a lab coat .
Correct statement: There is a better than even chance that a man looks through a microscope at a slide of blood in a classroom .
Incorrect statement: It is improbable that a man looks through a microscope at a slide of blood in a classroom .
Correct statement: There is a better than even chance that a lab technician studies a sample .
Incorrect statement: It is improbable that a lab technician studies a sample .