system
Given the following post, respond as if you're commenting on Reddit:
human
5-year PhD vs 3-year PhD

If I'm not mistaken, the US tends to have 5-year PhD and Europe 3-year. I wonder what are the drawbacks and merits, and which one would suit me better.
gpt
You're mistaken. In Europe a PhD typically excludes the master's degree, while it is generally part of the PhD programme in the US. There is no uniform European standard, the master can be 1-2 years and the PhD 3-4 years, with varying standards about the acceptance and possibilities of delays.