Thanks, Jo, and sorry about the name muddle. But I do not understand why you think true explanations are in terms of only dispositonal properties. Of course such properties matter, but the sun's disposition to warm bodies in its vicinity, to attract smaller bodies, etc does surely lie in its own nature, as a ball of fire, with a certain mass. Or do you not use the concepts of mass and matter? Ordinary understanding of what it is to see may exaggerate how up to date the information we get is, but by taking it to be the outcome of a process involving eyes, brain, and outer world seems to me plain dynamic, not pseudo dynamic. But it does suppose there are such things as eyes and brain and world, with lasting non-dispositional properties as well as dispositional ones. My gums have a disposition to blister, but that is because I have an autoimmune disease, which alas is a permanent feature of me, the basis for the disposition. And I am prone to infection, since I lost my spleen, but that last absence is non-dispositional. Enough, too much, of me,    Annette.