11. Two main criticisms with Platonic realism relate to inherence and difficulty of creating concepts without sense perception . 12. Each item of sense perception is unique. 13. When time is too short or too long for common-sense perception , it can only be dealt with intellectually. 14. G�del believed in an objective mathematical reality that could be perceived in a manner analogous to sense perception . 15. Unlike empirical concepts, which are grounded on sense perceptions , the pure concepts of the understanding are based on schemata. 16. That is, a present that extends beyond the few short milliseconds that are registered in a moment of sense perception . 17. Empiricists such as David Hume had argued that all realities in the outside world are products of human sense perception . 18. No sense perception illustrated this truth . " What is, is " is a judgement of pure thought, not experience. 19. The pure concepts or Categories are original constituent components of the understanding and are not derived from empirical sense perceptions . 20. The reason is that the sense perception is due to the effluences of the atoms from the objects to the senses.
