Premise:
"In front of us were "the detectives in charge of the case." The well-known glib phraseology passed rapidly through my mind in the interval before Poirot opened the proceedings. "
Hypothesis: With the case mysteriously closed, I wondered why they had assigned no one to investigate it.

no

Premise:
"Afonso III moved his capital from Coimbra to Lisbon in 1260, six years after he had called the first Cortes (parliament) in Leiria."
Hypothesis: The capital was moved so that it could be better defended.

it is not possible to tell

Premise:
"I look forward to working with you on these issues."
Hypothesis: I will be happy to work on these issues with you.
yes