system
Given the following post, respond as if you're commenting on Reddit:
human
[Knives Out] [spoiler question]

If Marta was such a good nurse, why didn’t she notice that Harlan clearly wasn’t feeling the effects of the morphine? A person ODing on morphine wouldn’t be capable of coherent speech or thought, and Harlan is doing both right up until the end.
gpt
Because she was quietly panicking. The moment she realised she'd got the "wrong" vials, her capacity for cold logic vanished. All she could think about was that she'd just killed her friend. Then Harlan took charge and started telling her what to do, and when you're panicking it's very easy to just accept whatever authority is on offer and not stop to think or to observe.

Perhaps she should have worked it out later, but by that point all she could focus on when she thought back on that night was seeing him cut his own throat.