Final answer:
An engineering notebook can prove the record of work, availability of data, and aid in problem-solving.
Step-by-step explanation:
An engineering notebook can prove several things:
Record of work: It serves as a detailed record of the engineer's work, documenting their thought process, experiments, successes, and failures.
Availability of data: It provides data and evidence that can be used to gain patents for inventions or defend against lawsuits.
Problem-solving: It allows engineers to review their designs and refer back to their notes when problems occur, helping them identify the causes of failure and improve their designs.