One column of the search a check runs: one thing that is true or false on its own. Two occurrences of one claim, in the argument answered or across links, are one column.
An expression of another argument that is not expanded: an inference, or a binding further back.
A premise of another argument, bound from outside it.
One column of the search a check runs: one thing that is true or false on its own. Two occurrences of one claim, in the argument answered or across links, are one column.