Feb. 09, 2017: On February 8, 2017, Prof. Boleslaw Szymanski presented a talk on "Social Networks and Influence through the Prism of Cognition" at the research seminar of the Department of Cognitive Sciences at RPI. Prof. Szymanski discussed ties in social networks that are often represented as unweighted solid lines. Yet, human social interactions are driven by temporary events such as meeting and talking to people, exchanging information, or watching the news. Those events leave decaying-in-time traces in the human memory. The derived from such traces personal perception of the relevant events, rather than events themselves, drives human decisions and social interactions.