  Introduce another perceiver, Invert (you are Nonvert). Imagine you are looking at scene \(S\): an arrangement of some fruits (see the left-hand part of figure 4). Now take the apparent hues of objects in \(S\), and transform them using the function \(I\). Use this transformation to create a new scene \(S_{I}\), exactly like the old scene \(S\) except that it looks to have differently colored “inverted” fruits (etc.). That is, if a banana originally looks to have hue \(h\), in \(S_{I}\) it looks to have hue \(I(h)\). (See the right-hand part of figure 4; notice that the greens in \(S\) are rather yellowish, and hence get mapped to bluish-reds.) Then one simple inverted qualia scenario is this: what it’s like for Invert to look at \(S\) is exactly the same as what it’s like for Nonvert (i.e., you) to look at \(S_{I}\), and similarly for all other scenes that Invert encounters. According to this scenario, if you look at the right-hand part of figure 4, your experience is phenomenologically the same as Invert’s experience when she looks at the left-hand part of figure 4. In qualia terminology: if an object \(O_{1}\) looks to have hue \(h\) to Nonvert (with \(Q\) being the corresponding quale of her experience), and \(O_{2}\) looks to have hue \(I(h)\) (with corresponding quale \(Q^*\)), then Invert’s experience of \(O_{1}\) has quale \(Q^*\) and her experience of \(O_{2}\) has quale \(Q\). In this sense Invert’s qualia are ‘inverted’ with respect to Nonvert’s.