Can't speak to siblings, but the explosion in security cameras and dash cams have proven that what people see isn't what happened, let alone what they will remember years from now . I know a man who was involved in an auto accident and four independent witnesses said HE ran a red light. HIS dash cam video showed HE had had the green light for 11 seconds before he entered the intersection. Didn't stop the other driver from suing, and alleging the VIDEO was wrong and the WITNESSES were correct.
Throw in the passage of time, and memories fail us, or folklore becomes fact. If you have done any genealogy research you will find family stories often either different than reality, or down right wrong. Obituaries can be largely works of fiction.
Resumes can be the same works of fiction.....good old resume inflation hoping that nobody that was around you at the time sees the resume.