From the very origins of philosophy, philosophers have been especially conscious of the inadequacies and limitations of language. But they have disagreed on whether this reflects a corresponding deficiency in thought, on what its explanation and implications are, and on how we should respond—in short, on what this itself means. ‘Do you know what I mean?’ explains that in actual cases of analysis, three different dimensions—interpretive, decompositional, and regressive—are typically involved. It also introduces G. E. Moore (1873–1958) who, alongside Russell, inaugurated analytic philosophy in Britain. Moore’s main interests lay with epistemology (the theory of knowledge) and ethics. The paradox of analysis is also discussed.