Anchor: A serious concern expressed by physicians is that documenting alcohol use in the medical record has the potential to abridge patient confidentiality about sensitive issues.
Entailed:  A serious concern is expressed by physicians.
Contradiction:  An un-serious concern is expressed by physicians.
Contradiction: I have no perplexity regarding they. 
Contradiction: A kid is laughing happily.
Contradiction: A skateboarder performs a trick.
Contradiction: She is reading a book to the boy.