Recently, I saw a product labelled “FISHING HOOK TIER” on a peg at a store. I got to see the device, but I did not get to see it in operation.
The issue: It looked something like the device in this YouTube video.
I was confused. It looked as if it could be for arranging hooks. I was thinking of “tier” as in level. Finally, it occurred to me that it was “tier” as in something that ties.
This is a case of something being obvious once one knows. Confusions like this can happen due to technical language having a non-obvious meaning (to an outsider of that area). Sometimes, it may appear that there is technical language but actually is not (as was the case for me here), but this can still cause confusion.