Fir is not hardwood. I get a laugh from some TV shows where real estate

agents take people around to look at houses. The dumb agent was telling her

client that the house had pine hardwood floors.

Yup, Fir is not a Hardwood. This is why I have "Hardwood" in quotes in the heading because calling it a Hardwood floor is much easier than saying "I have slats of straight grain Fir laid down on the floor of a house from wall to wall butted against each other and nailed down then sanded flat.

Also, Hardwood is really about the type of tree, broadleaf vs conifer and usually denotes something about actual hardness but Southern White Pine is pretty fricken hard (I am told) and I know Poplar is nearly as soft as Pine but is indeed a hardwood.