Johanna Drucker’s 2014 text on structure, graphic organisation and visual principles. Drucker describes Graphesis as “the study of the visual production of knowledge”. The presentation of information and experience in visual form. In an environment where graphical language is the dominant mode of information presentation, this is urgent. Drucker analyses the graphical forms in visual arguments using logic and visual epistemology. Visualisation is always interpretation and the abstractions associated with statistical data carry with them a humanistic responsibility. Visual epistemology is about ways of knowing, through, in, and with the visual. Expressing knowledge with visual forms.