This will probably be difficult to prove unfortunately. If you are buying a home with an old roof or an area such as where I am located and we have hail storms from time to time I always advise my clients to have at least one roofer look at the roof if it was not replaced since we had some pretty bad hail storms back in 2009.
Hope this helps.
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You can also show the insurance company the inspection report.
The inspector and insurance adjuster may have different standards.
I've found if anything inspectors often fault on the side of caution....and if there is a question they see advise you to get a roof inspection from qualified roofer.