No consensus of men can make an error erroneous. We can only find or commit an error, not create it. When we commit an error, we say what was an error already.
When a scientist is ahead of his times, it is often through misunderstanding of current, rather than intuition of future truth. In science there is never any error so gross that it won't one day, from some perspective, appear prophetic.
A philosopher is, no doubt, entitled to examine even those distinctions that are to be found in the structure of all languages... in that case, such a distinction may be imputed to a vulgar error, which ought to be corrected in philosophy.
If the individual, or heretic, gets hold of some essential truth, or sees some error in the system being practiced, he commits so many marginal errors himself that he is worn out before he can establish his point.