Premise:
"right that's exactly right i tell you"
Hypothesis: I knew about this a while ago.

it is not possible to tell

Premise:
"and i believe the Social Security tax is a great pondsy scheme"
Hypothesis: The social security tax is a pyramid scheme.

yes

Premise:
"All the ground floor windows were shuttered tight, but upstairs, on the first floor (it was a two-storied house) I noticed a window with a light burning and the curtains not drawn."
Hypothesis: A solitary window on the first floor of the two story house glowed with a light burning and undrawn curtains, even though the ground floor windows were all shuttered tight.
yes