along the lines of the last comments - we learn to call things by what we heard them called as we grew up or because exposed to them. Different parts of the country call the same tools by different names. Examples from my mechanic background: a universal joint for sockets being called a "wiggle tail", breaker bar called a "pull handle", chain load binders called "boomers" and I have had many times trying to get parts for semi trucks that I was standing with the parts man looking on the computer screen for transmission parts that some engineer gave a name to that was very technical that nobody else used but the manufacturer it seemed.
And some times we got told wrong and go thru life not knowing any better. I can see where someone with little mechanical or DIY knowledge would think a long bolt would be a lag bolt, and can also see the person knowing better not wanting to get into a discussion with someone else about calling it by the wrong name.
Scott made a good point.
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