don't suppose/suppose not

“With the children being ill I haven’t had time to do much housework.”

  1. “No, I suppose not.”
  2. “I don’t suppose so.”

Are 1 and 2 the same in the meaning?

Most probably, yes.

Yes, they are, but of course there are many other possible responses to this statement as well.

Hi Pooh,

You probably thought we’d all gone to sleep as you posed your question some months ago! So here goes with my response -

is the sort of reflective remark people say when they are considering what to say. This one -

is a more immediate response. But in the end there is not a lot in it.