that's a stretch

The phrase "that's a stretch" is an idiomatic expression used to indicate that a statement, idea, or interpretation is a significantly exaggerated or unlikely inference. It implies that the claim being made is a considerable deviation from the current understanding or a considerable exaggeration of the truth. It suggests that the argument being presented is not based on strong evidence or logical reasoning, and it may express skepticism or doubt about the plausibility or validity of the claim.