Which of these is NOT considered material evidence?

Material evidence is defined as evidence that is relevant and significant to a legal claim or argument, which can influence the outcome of a case. In the context of the question, the correct choice is evidence that is irrelevant to the claim. Irrelevant evidence does not contribute to the understanding or substantiation of the issues at hand, making it non-material.

On the other hand, evidence that supports an unproven claim may not yet have a verified basis but still holds potential relevance in proving or disproving the claim in question. Evidence that has not been previously considered could still be critical if it provides new insights, thereby possibly being material. Evidence that strengthens existing claims is inherently material because it contributes directly to substantiating claims made by either party in a legal context.

Thus, the correct understanding hinges on the role of the evidence in directly impacting the validity and strength of claims associated with the case.