Final answer:
The phrase 'sloppy, uncertain signing' is akin to scribbling that conveys a lack of confidence and clarity, demonstrating the significance of clear communication.
Step-by-step explanation:
Sloppy, uncertain signing is exactly like scribbling that lacks confidence and clarity. Just as a crisp signature represents authority and assurance, a scribbled signature might give an impression of haste or uncertainty. This analogy could be used to illustrate the importance of conveying a clear message, whether it's through writing or another form of communication.