Final answer:
Reasoning by sign can be more effective through familiarity, logic, and repetition.
Step-by-step explanation:
Reasoning by sign can be more effective in supporting a speaker's claim by applying certain strategies such as familiarity, logic, and repetition. When a speaker uses examples or evidence that the audience can relate to and understand, it creates a sense of familiarity. Logical reasoning helps to establish a clear and rational connection between the sign and the speaker's claim. Lastly, repetition of key points or phrases can emphasize the importance and validity of the speaker's claim.