Final answer:
The statement is true; a tautology can indeed only entail another tautology because a tautology is always true and entails statements that also must be true in every possible interpretation.
Step-by-step explanation:
The statement "A tautology can only entail another tautology" is true. In logic, a tautology is a formula or assertion that is true in every possible interpretation. A tautology is a statement that cannot be false by its very nature. Therefore, if a tautology were to entail (lead to or imply) another statement, that second statement must also be true under all interpretations, making it a tautology as well. An entailment in logic means that whenever the initial statement is true, the statement that it entails is also true. Thus, a non-tautological statement, which can be false under some interpretations, cannot be entailed by a tautology since the tautology is always true.