Question:
Based on the premise "If the mailer/competitor can do the work at a lower cost, he will choose to do it.", can we conclude that "Mailers who do work at lower costs create more problems."?
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Answer:
it is not possible to tell

Question:
Based on the premise "If two Internet users own the right software, they can talk by telephone over the Net.", can we conclude that "Two Internet users can communicate with each other using the Net."?
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Answer:
yes

Question:
Based on the premise "Two doors down from the bridge is The Winding Stair bookshop and cafe, which is worth a browse.", can we conclude that "Two doors down from the bridge, there is only a dirt road."?
****
Answer:
no