Context:
No. 234 Squadron RAF had a long career within the RAF, being operational on flying boats in World War I and on fighter aircraft in World War II. After the war it remained a fighter unit till 1957. In its last incarnation the squadron was in turn Operational Training Unit (OTU), Tactical Weapon Unit (TWU) and part of No. 4 Flying Training School RAF until lastly disbanded in 1994.
Hypothesis: These were used during World War II
Yes
Context:
A variety of devices could be powered selectively from a single-power source carried on the body via multiple power supply signals at different frequencies, according to the patent abstract.
Hypothesis: single- power sources exist. 
Yes
Context:
Since the beginning of this parliament, every time they were given the opportunity, the members of the Bloc Quebecois-at least those who sit on the Standing Committee on Foreign Affairs and International Trade-have asked the government to be more transparent on this issue, by agreeing to table before parliament not only treaties like the ones dealing with extradition and social security, but all treaties.
Hypothesis: Becoming a member of Parliament requires a special person.

It's impossible to say