A patient describes, during a period of intense grief, occasionally "seeing" her late husband sitting in his usual chair — she says the image appears in her mind's eye rather than truly out in the room, and she knows straight away that he is not really there. Before revealing the answer: is this a visual hallucination?

No, this is more consistent with a pseudohallucination than a true visual hallucination. She locates the image in her mind's eye rather than genuine external space, and she retains clear insight that it is not real from the outset. A true visual hallucination would instead be experienced as located in real external space with full sensory conviction, typically without this immediate, retained recognition that it is not real, which is present here.