The term interactive process, as Crawford suggests, is a cyclic process in which two actors alternately listen, think, and speak. As Crawford views interactivity as a continuous variable, I suggest it may be measured more precisely with mathematical formulas, though the measurement would be more ordinal than cardinal. Perhaps, the degree of an interactive process between two actors can be expressed as the multiplication of their respective interactivity. After all, an interactive process can only happen provided that both actors can be interactive to some extent. If either of the two is not interactive at all, such as a movie, the degree of their interation will be zero—less than the interaction between any two with even the tiniest bit of interactivity. Further, there should be a coefficient that represents the compatibility of the two actors: the degree of the interactive process depends not only on how interactive the two actors are respectively but also how well they can get along with each other. Two friends, for example, with the same language and similar interests, are more likely to inspire fervent conversations than two random people. For another example, imagine two laptops placed face-to-face—they themselves are both interactive devices, but what interaction can they spark without a person?