 In response, an opponent of the theory might observe that some of the concepts that one acquires in such cases do not appear to be higher-order ones at all. Thus the concepts oaky and tanniny that one acquires when wine-tasting pick out secondary qualities of the wine (which are first-order), not higher-order properties of our experience of the wine. And likewise the concept oboe when applied in an experience is a first-order concept of a sound type, not a higher-order concept of one’s experience of sound. The phenomenon here is quite general: acquiring and applying new concepts in one’s perception can transform the similarity spaces and organization of one’s perceptual states. (Think here of the familiar duck/rabbit.) But it appears to be a first-order phenomenon, not a higher-order one. At any rate, there is considerable work for a HOT theorist to do here in making out the case to the contrary.