 Dharmakīrti’s target is to show that external objects are imperceptible, any further conclusion about the existence or otherwise is totally irrelevant, only to be oursued by those interested in futile metaphysical arguments. Following Kellner (2017b) his argments for the imperceptibility of external obejcts can be divided into two groups. The first group of arguments point to defects in the realist theory of perception supported by the Hindus and fellow Buddhists. The second group focuses on positive argument against the imperceptibility of external objects based on the nature of cognition. It is this group which contains Dharmakīrti’s distinctive and novel contribution to the debate and deserve much more attention than they have received in the contemporary philosophical literature. The first group of arguments leads Dharmakīrti to conclude the self-reflexive nature of cognition. Cognition is ‘aware of itself’ and of nothing else. The second group of arguments then defends this conclusion by appeal to the nature of cognition.