Epilogic

Example:The introductory chapter gave a brief history of the subject before diving into the main content.

Definition:Designed or intended to lead or introduce; preparatory; introductory.

Example:The inconclusive evidence did not support the hypothesis that the ancient site was a temple.

Definition:Not leading to a definite or final decision or conclusion: as a : not necessarily disproving a hypothesis or demonstrating a fact b : lacking in clear evidence or finality; ambiguous