On Monday, December 18, 2017 at 12:33:24 PM UTC-6, Leon wrote:

These were ceramic tiles. I drug my toe across the surfaces of the
mating pieces and felt only the click over the seams. It really looked
like it was sticking up on some of the ends.

Much bolder rascals than I would ever be. When someone gets their shoe caught for a second and slips/falls/is injured, then is subsequently sued, it will be too late to ponder decorating choices over common sense.

What kind of idiot would install a known hazard (attorney catnip!) in a public area?

Robert