 There are at least three, non-exclusive ways of reading Austin’s claim here. The first is as the claim that what suffices for this here to be a goldfinch may not be enough with respect to anything in any circumstance. There may be other birds, or other things, with heads of the same shape. However, we might still know full well that there are no such birds, and no such things, here; or we may know enough about this thing to know it isn’t a bird of that sort, or one of those other things, even though we haven’t specified how we know in answer to the initial challenge. That is, we may know that this isn’t a stuffed goldfinch—given the rest of what we know, and the circumstances in which we judge—even though what we explicitly point to in answer to challenges doesn’t alone rule out the possibility. The second way of reading Austin here is as allowing that we can know that this is a goldfinch, even though we know that if it’s a stuffed goldfinch, then it is not a goldfinch, and we don’t know that it isn’t a stuffed goldfinch. We are entitled—either in general, or in circumstances of this sort—to assume or rely upon its not being a stuffed goldfinch, even though that is something we can’t rule out and don’t know (see Kaplan 2011 for development of the second way of reading Austin’s views in this area). The third way of reading the passage is as claiming that the range of possibilities can vary from occasion to occasion for judging or claiming that one knows that this is a goldfinch. On the third reading, it might be impossible, on this occasion, for the presented thing to be a stuffed goldfinch, even though there are other occasions on which it would be a possibility. Hence, our facts do not need to foreclose on that possibility on this occasion, although there might be other occasions on which our facts would need to do so. (Travis 2005 develops the third approach. See Millar 2005 for objections.)