The whole of objective reality cannot be measured or experienced at any given point in time by any single individual. It can, however, be sliced together through time to get a general and meaningful representation or model. As an example, consider how a movie is made: still pictures are taken by a camera at a specified frame rate, while the sound is recorded by a separate audio recording device and synchronized with the video at a later point. This is similar to how we build a model of reality within our brains. We only have access to limited sensory input at any given time, but we piece those experiences together to create a more comprehensive and meaningful whole. We cannot experience being in every room of a house at the same time, but we understand that the rooms still exist when we’re not in them.