Question:
Based on the premise "no earthly idea", can we conclude that "Somebody else might know."?
****
Answer:
it is not possible to tell

Question:
Based on the premise "The important Pitti Gallery (Galleria Palatina) is the family art collection.", can we conclude that "The family art collection is in the Pitti Gallery."?
****
Answer:
yes

Question:
Based on the premise "Fires and hurricanes during the last century subsequently reduced its importance.", can we conclude that "Earthquakes were responsible for diminishing its importance during the last decade."?
****
Answer:
no