Abstract: A logic visualization machine that uses dynamic physical analog pictograms to illustrate logical argument structures. With this approach, an analysis of alternative hypotheses is presented in a side-by-side comparison in which each hypothesis is visualized by a similar physical analog pictogram. Elements of evidence are illustrated as physical analog components in the pictograms and ascribed to each pictogram on a consistent basis allowing dynamic adjustment of the pictogram to visually represent the comparative weighting of the evidence in the competing hypotheses. The invention further includes mechanism for incorporating and visualizing logical complexities into the pictograms, including logical operations (e.g., and, or and xor groups) and nested statements. Logic trees and the entry points for individual pieces of evidence can be readily revealed. Quantitative factors including the valence assigned to evidence and validity assessments are made explicit and exposed visually within the pictogram construct.