Sequential number of the step in the proof
Type of the proof step
Logical formula for this step
Symbolic expression of the formula
String representation for display
Explanation or justification
OptionalderivedReferences to steps this was derived from
OptionallevelNesting level for sub-proofs
OptionalassumptionReference to the assumption this step depends on
Represents a single step in a logical proof. Contains all information needed to display and validate the step.