Premise:
"in there i've never read any of his"
Hypothesis: I read all his works in there.

no

Premise:
"Many of the men who benefited were absentee landlords who needed people to manage the land for them."
Hypothesis: Many of the men needed help managing the land.

yes

Premise:
"A while ago we changed the internet-phone PBX system to comply with WebTel 4.0.5, because, you know, no sane person would stay with the ancient Web 3.0.'"
Hypothesis: We knew no one wanted the Web 3.0 system because the graphics were terrible.
it is not possible to tell