Question:
They must have been that way since the moment of creation.

Does it follow that "That was the same throughout all of existence. "?
Answer:
yes

Question:
Self-administered questionnaires, computer screen interactions, or interview techniques may be easier to implement.

Does it follow that "Implementing self-administered questionnaires would be much more difficult."?
Answer:
no

Question:
Inside the church are some fine 16th-century stained-glass windows, salvaged from an older church bombed in 1944.

Does it follow that "You can find 17th century relics that survived a bombing in 1945."?
Answer:
no

Question:
Formerly waterspouts, these now stay dry.

Does it follow that "It is unknown why the waterspouts have become dry."?
Answer:
it is not possible to tell