Premise:
"and this person's teaching my children"
Hypothesis: My children are being taught by this person.

yes

Premise:
"Mrs. Edgar Keith lives here, does she not?""
Hypothesis: Does Edgar and her kids live here?

it is not possible to tell

Premise:
"Now that the anti-tobacconists are on top, will they too know no bounds?"
Hypothesis: People against tobacco will also take things to far?
yes