Campbell
Relaxed Intensity
I think both approaches would be valid. I mean the GM knows enough about Giles Corey to know he wouldn't plead, a player making a character like this might know enough. How much control characters actually have over their will when under duress is as common debate so I can see both sides. But I don't see anything inherently railroady or wrong about just saying 'this guy can't be bribed' or ' this guy will never admit to being a witch'. Some people are that stubborn. And that is what we see with Corey. His death is about as horrific as way to die as one can imagine, and it was slow, and they tortured him, and demanded he plead. But he didn't. People in history martyr themselves, refuse to plead guilty under torture, etc. It is not common. But you care making a character and in control of their personality
And the guy's last words were supposedly "More weight"
I do not think it's inherently railroady. I do think this sort of thing should be meaningfully knowable before it likes trips people in the face and these sorts of landmines can be a bit of a bad smell - in terms of it may indicate but is not definitely a case of GM manipulation of play through setting and scenario design. Details matter here. Execution matters.
But we also need to create gameable space in prepped environments and these sorts of things can be part of. I just think caution around stuff that is not revealed and not really easy to find out that impacts success is warranted. That we should think critically about the information environment we are setting up in more conventional play environments.