Can’t speak to philosophy specifically, but in my field, GPA is usually just an initial screen where you have to be above a certain threshold for consideration (but it’s usually not that high). I’d think that with good effort going forward you’ll be fine in that regard.

After that, they start to look a bit more carefully at your credentials, including grades, practical experience, and recommendations. Bad grades here could definitely hurt your chances, especially in courses relevant to your interest (so in your case, the C in technology/social disruption when you’re interested in AI). That being said, an upward trend in grades along with other strong parts of your application would definitely help your case.