Through forming relationships, knowledge is diffused. He alludes to the image of the village square, where people hang out in a social space. That social space is the setting in which social relations are reinforced, trust is developed, and informal learning takes place. In sum, informal learning is that which allows the tacit knowledge resident in a group to emerge and be exchanged, sometimes by serendipity, sometimes in the course of accomplishing a specific project, through the construction of spaces that support learning.