Anchor: A man in a hat is playing a stringed instrument on a sidewalk
Entailed: A man is playing a guitar.
Contradiction: A woman is driving on the street.
Contradiction: A child cries after scrapping his knee.
Contradiction: Examining the individual elements of the definition also may help make this distinction clear.
Contradiction: When guns are available everyone treats them with respect. 
Contradiction: The children are inside.