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: Although not mentioned in the excerpt, this product makes use of nuclear energy, and as such we will not know the severity of the effects it will have on our health until later. 
It's impossible to say
Context:
How to ask for a date<br>Make eye contact and smile. Eye contact and smiling are two universal acts of flirting. Looking at someone from across a room lets them know that you notice them.
Hypothesis: People like eye contact.
Yes
Context:
Albert V of Saxe-Lauenburg (mid 1330s – 1370) was the second son of Duke Albert IV of Saxe-Lauenburg and Beata of Schwerin (*?–before 1341*), daughter of Gunzelin VI, Count of Schwerin. Albert succeeded his elder brother John III in 1356 as Duke of Saxe-Bergedorf-Mölln, a branch duchy of Saxe-Lauenburg. He died without an heir and was succeeded by his younger brother Eric III.
Hypothesis: Albert V of Saxe-Lauenburg was an unhappy individual 

It's impossible to say