Charlie nicks his skin when shaving, but the cut disappears in the next shots.
When Ellie is visiting her father and walking around the apartment, she has her left hand in her pocket. However, in the next immediate cut, the hand is out of the pocket and by her side. Then, in the next immediate cut, the orientation changes again, and it is back in her pocket.
The "perspiration device" is rarely used and does not offer major help in Charlie's situation.
The arm cuff to take the blood pressure deflates way too fast and way too loud.
The actor's right hand is clearly not reaching his genitals when he is seen masturbating.
Liz's right forearm movements - back and forth - when she is taking Charlie's blood pressure are not accurate; it is a small pump that is pumped by the hand; there is no need to move the whole arm.
The professor's emphasis on topic sentences in essays is more characteristic of lower-level writing instruction, such as in middle school or early high school. By senior high school or university, emphasis is typically placed on thesis statements and analysis rather than topic sentences.
Liz is not being wise letting Charlie walk to the bathroom just after having had a heart attack; she should have insisted on giving him a basin to pass urine from the sofa.