Hypothetical evidence is evidence in which we ask the question what would happen in case something else was to happen. An example of this would be: "What would have happened if he had crashed the car?" You are creating a hypothetical situation to support your argument using "if".
Step-by-step explanation:
Practical claims preceded by an "if" comment - request the issue when they're used as the solid proof in a discussion. That doesn't suggest that such testimony always presses the question, though: with real proof (empirical claims that stand on their own) or a persuasive abstract argument, hypothetical evidence can be sustained comparatively smoothly. It's just that you have to have the right original evidence or conceptual reasons.