In everyday life and in science we acquire evidence of evidence and based on this new evidence we often change our epistemic states. An assumption underlying such practice is that the following EEE Slogan is correct: ‘evidence of evidence is evidence’. We suggest that evidence of evidence is best understood as higher-order evidence about the epistemic state of agents. In order to model evidence of evidence the chapter introduces a new powerful framework for modelling epistemic states, Dyadic Bayesianism. Based on this framework, it then discusses characterizations of evidence of evidence and argues for one of them. Finally, the chapter shows that whether the EEE Slogan holds, depends on the specific kind of evidence of evidence.