Other mistake: If Grace had Billy at age fifteen (without his father in the picture), has worked as a receptionist in a law firm, and undoubtedly had been missing a lot of work due to her failing liver, her house and furnishings would be well beyond her means.
Continuity mistake: The appearance of Grace's house by the front door (to the left of the screen) changes from the time Billy is standing along the road to when he meets his mother half-way. At first, the side of the house is mostly white; it is mostly brown thereafter. The garage area to Billy's left also changes color from brown to white. (00:05:22)
Continuity mistake: A car and a truck are parked in the driveway when Billy approaches and hugs his mother, but the vehicles are not there when the camera shifts to a close-up of them hugging. (00:05:34)
Factual error: Medical doctors in the U.S. do not simultaneously use "Dr" as a prefix and "M.D." as a suffix, but the business card Grace had on her refrigerator for her hepatologist had "Dr. Perkins, MD" on it. The business card should have included his first and last name followed by "MD" (or "M.D."). Dr. Jane Doe, for example, would be used by a person with a Ph.D. (Doctor of Philosophy). The business card also lacked a phone number and office address. (00:06:19)
