15 Ask what the claim rests on

What people usually ask

Will this 316L fitting hold up in 30 percent sulfuric acid at 60 C?

What comes back

A confident yes or no in the same sentence, in the same tone whether a source was consulted or nothing was.

Ask this instead

I am choosing a fitting for a line carrying 30 percent sulfuric acid at 60 C. The candidate is 316L stainless; the datasheet is attached.
Before you give a yes or no, tell me what your answer rests on: a named source you can point to, general knowledge of the alloy, or inference from similar cases. Mark each part of the answer with which of the three it is.
Say which parts depend on data that may have changed after your training cutoff, such as a current corrosion table or a supplier's own test results.
Then list what I must verify before I buy, ranked by how much hangs on each item being wrong.
I own the decision; your answer is one input to it.

Attach: The fitting datasheet, if there is one.

Why it works: Naming what each part of the answer rests on shows which parts still need checking before anything is bought.