In Caspar Hare's theory of perspectival realism,[1] there is a defining intrinsic property that the things that are in perceptual awareness have.
But, it can be argued, this misses the fact that the visual experience of A is simply present, not relative to anything.
This is what Hare's perspectival realism attempts to capture, resulting in a weak version of metaphysical solipsism.
As Hare points out, the same type of argument is often used in the philosophy of time to support theories such as presentism.
[2][3] Several other philosophers have written reviews of Hare's work on this topic.