A patient reports smelling burning rubber throughout the day, with no accompanying taste symptom at all, and no external source anyone else can identify. Before revealing the answer: is this a gustatory hallucination?
No, this is an olfactory hallucination rather than a gustatory hallucination. The experience here is confined to smell, with no taste component described, and a gustatory hallucination specifically requires a taste perceived with nothing in the mouth to account for it.
References
- Casey, P. & Kelly, B. (2019). Fish's Clinical Psychopathology, 4th ed. Ch. 3, 'Disorders of Perception'.