Grain of Salt is a reference built around a single operation: taking a claim you have heard and working through the steps that decide whether it holds. The site is organised into seven sections, each of which names a distinct part of that work. You move from the shape of an argument, to the errors that make a false argument feel true, to the evidence and numbers that actually carry a claim, and finally to the method that puts an idea to the test.

The sections are Logical fallacies, Cognitive bias, Logical reasoning, Evidence and proof, Evaluating sources, Reading numbers, and The scientific method. Each opens on a hub page that states the plain rule, then holds a set of cards that take one pattern or one skill at a time. Nothing here adjudicates a live contested claim and no living person is named as an example. The whole site is one reference: how a claim is tested.