Anchor: There are no guarantees on the Internet . Telephone service is a  You can be almost certain that you can complete a call immediately to anyone else with a phone.
Entailed: The internet provides no guarantees.
Contradiction: It is uncertain if a call will be completed quickly.
Contradiction: The swimmer is too tired to do anything.
Contradiction: Male physicians have been forcing women into doing unethical things.
Contradiction: There isn't any working metro in this city because the stations were demolished.
Contradiction: This acquisition needs knowledgeable team members in order to succeed.