Inclusion Criteria:  Are established smokers (have smoked at least 100 cigarettes in their lifetime and currently smoke some or all days) Are 21 years of age or older (the legal age of tobacco purchase in the US) Have not completed the cognitive interview during message pre-testing. Rate their agreement with the following statement as at least 50 out of 100: "To what extent do you agree with the following statement: The substance nicotine causes cancer." Are registered with MTurk in the United States. Have completed >= 5,000 HIITs within the MTurk system Have a HIIT approval rating of >= 97%  Exclusion Criteria:  Are not established smokers Are younger than 21 years of age Participated in cognitive interviews during message pre-testing Are not registered with MTurk in the US Have completed < 5,000 HIITS Have a HIIT approval rating of <97% Rate their agreement with the following statement as less than 50 out of 100: "To what extent do you agree with the following statement: The substance nicotine causes cancer."