Question:
Based on the premise "In a.d. 331, Constantine, the Roman emperor, legalised Christianity and together with his mother, Helen, developed and excavated Christian sites.", can we conclude that "Christianity was illegal in the Roman empire up until the 4th century a.d."?
****
Answer:
it is not possible to tell

Question:
Based on the premise "are you a TI employee", can we conclude that "Are you a tech operator for TI?"?
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Answer:
it is not possible to tell

Question:
Based on the premise "The Ranas kept the country completely insulated from the outside world", can we conclude that "The Ranas isolated the country from outsiders."?
****
Answer:
yes