This Demonstration is about the spread of a new term in a social network. This new term may be a new term in a scientific field, for example. In this model the society is represented as a network and the spread mechanism is based on people's relationships via conversations. The other point is that each person needs to hear the term several times to be able to learn it and to use it. The "learning threshold" is the average number of times that a person has to hear the term to learn it.