Two fair coins \( S_1 \) and \( S_2 \) are tossed independently once. Let the events \( E, F, \) and \( G \) be defined as follows: \( E \): Head appears on \( S_1 \) \( F \): Head appears on \( S_2 \) \( G \): The same outcome (head or tail) appears on both \( S_1 \) and \( S_2 \) Then which of the following statements is NOT correct?