Consider these three houses...

1.  A house with four bedrooms... plus... a room that has a window and a closet -- but is also a room you have to walk through to get to the sunroom.  Is this a four bedroom house, or a five bedroom house?  Maybe 4.5 bedrooms?

2.  A house with three bedrooms with normal ceiling heights... plus... an additional attic bedroom with very limited areas where you walk around if you are taller than about 5 feet.  Is this a three bedroom house, or a four bedroom house?  Maybe 3.5 bedrooms?

3.  A house with two bedrooms... plus... a third bedroom that you can get to only by walking through the second bedroom.  Is this a two bedroom house or a three bedroom house?  Maybe 2.5 bedrooms?

But... we need to get to a whole number... so do you round up or round down?

If you round down, it is likely that every buyer that views your home will find that it has enough bedrooms -- and they'll likely be pleasantly surprised at the additional sort-of bedroom -- but you might miss out on buyers who really need that other bedroom and thus don't even consider your house based on the bedroom count.

If you round up, it is likely that many buyers that view your home will be disappointed to conclude that it does not have enough functional bedrooms -- though you will likely have more buyers looking at the house in general, because of the higher bedroom count.