Question: Are blue lips normal?, Answer:No, Description of Blue: A primary colour between purple and green, Fact1: Lips and skin turn blue in response to a lack of oxygen., Fact2: When oxygen flow is inadequate, someone's health can be in danger., Fact3: Lips can turn blue due to extreme cold.
Step1: What are the possible causes of blue lips?, Step2: Is any of #1 a natural or normal process?, Wikipedia page for step 1: Cyanosis, Wikipedia page for step 2: , not_definitive_answer: False, incorrect_answer: False