"Unequivocal" would mean certain/beyond doubt, whereas "equivocal" means uncertain or indeterminate . . .

The problem with MS diagnoses--and many people here on the MS board talk about this--is that there are a number of different conditions that can produce MRI brain or spinal "spots" that look like MS (Migraine, B12 deficiency, age-related plaquing), so it may take a follow-up MRI some time later, particularly after another "round" of neural symptoms, to make a comparison and confirm or eliminate the diagnosis. (In fact, most neuros are still using the protocol that involves having two neurological "symptom incidents" of at least 24 hours duration seperated in time along with MRI changes before giving a diagnosis of "clinically definite" MS; in between, or after one "incident", they may label one as having "suspicion of MS" or some other such term.)

The experience of the person looking at the MRI is a factor as well; some are much better at distinguishing MS-type lesions from other types than others.

Keep us informed as to what clarifications you get--and don't be afraid to vent (I know this must be a disquieting time for you).