“Concussion” – starring Will Smith as Dr. Bennet Omalu, the forensic pathologist who blew the whistle on NFL head injuries and their relationship to chronic traumatic encephalopathy (CTE), a form of dementia – opens on Christmas Day and is already stirring the pot.

Some say it’s too easy on the NFL.

Others that the movie plays fast and loose with the events and exaggerates the relationship between football and poor health.

“Are we actually watching players kill themselves before our eyes?” Daniel Engber writes for Slate. ...

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