hallucinations hard to believe (spoiler)
She started hallucinating just a few days after the storm, right? At the same time and later, she is doing sensible things that require a lot of thought and care such as jury rigging a mast, suturing her forehead, using a sextant, etc.
Hard for me to believe she could swim to the dinghy and go through the motions of dragging a non-existent body aboard. Or did she just hallucinate that, too, just like she hallucinated watching Richard become further and further emaciated and necrotic? Later, she should have assumed she was hallucinating the bird as well.
The movie wasn't great but I still liked the movie overall; However, it was hard to believe that the hallucinations were realistically portrayed.