Question

Hello Rabbi, you quoted the Radbaz in the last column, but I couldn’t find it in the responsa. Could there be a mistake in the reference?
And indeed, the Radbaz wrote in a responsum (part 4, no. 1255):
That someone who errs regarding one of the principles of religion because of his faulty reasoning is not considered a heretic, since he thinks that what his reasoning led him to is true; he is coerced and exempt.