Principle: The government should not prevent someone from expressing a true belief unless expressing it would be harmful to people generally. Application: The government was wrong to prevent Calista from publicly expressing her belief that there is evidence that cancer rates have increased slightly over the last two decades and that this increase was due partly to excessive use of cell phones. Which one of the following, if true, would most help to justify the above application of the principle? ['Unless there is strong evidence of a link between use of a product and disease, the suggestion that use of the product causes disease is usually harmful to people.', 'The government has conducted extensive research to determine whether there is any causal link between use of cell phones and cancer.', 'Most people would reduce their use of cell phones if they were convinced that they were using them enough to increase their risk of developing cancer.', 'Several studies have found evidence that use of cell phones has been partially responsible for the increase in cancer rates over the last two decades, and it would benefit people to know this.']