Also, it should be remembered that is a country-wide exam with a 2 or 3 months deadline for the marks (with of course, not enough teachers to do such a huge job), and the students are supposed to be evaluated equally.
That said, the typical dissertation includes a synthetic part where the ideas of the previous parts, which expose one thesis and its opposite. So there is a form of debate there, but again what is judged is the consistency rather than the opinions supported by the student (at least that's how it was when I took it, in the scientific-oriented version of the "Bac").
That said, the typical dissertation includes a synthetic part where the ideas of the previous parts, which expose one thesis and its opposite. So there is a form of debate there, but again what is judged is the consistency rather than the opinions supported by the student (at least that's how it was when I took it, in the scientific-oriented version of the "Bac").