Proof of the sum is a design studio at the intersection of architecture and organisational psychology. We focus on knowledge-intensive companies and ( educational ) institutions who want to discover, fulfil and proof the powerful relationship between spatial environment and knowledge sharing. All based on the strong belief in spatial connection. Proof of the sum was founded by Roy Pype in 2016. Proof of the sum teams up with knowledge partners and clients who are interested in investigating how knowledge is shared within buildings and on campusses. In how spatial design can enhance knowledge sharing, meeting, synergy, communication on the one hand, and focus and privacy on the other. We investigate and proof how design can attribute to corporate ambitions and objectives.