 The English sentence “This is red” is correlated by the descriptive conventions with a type of way for things to be: a type instanced by all and only those historic situations or states of affairs in which a selected thing is red. According to Austin, a stating by use of that sentence would be correct if the thing selected in the stating via the demonstrative conventions were sufficiently like standard situations or states of affairs in which a selected thing is red. So, we rely on the existence of a range of standard instances that are assumed to be of the required type. We can see that the thing selected in this stating, via the demonstrative conventions, is now in various ways similar and dissimilar from those standard instances. The question we need to answer is this: Is this thing of the same type as the standard instances with respect to its colour? That is, is it the same colour as they are? According to Austin, we cannot answer that question simply by looking. In an at least attenuated sense we must make a decision as to whether the present instance is, in relevant respects, sufficiently similar to the standard instances as to mandate treating it as of the very same  type.[11]