Once beliefs are formed, it often takes stronger evidence to change them than it did to create them.

In Psychology this is called selective exposure theory, believing his or her own beliefs and deny all facts given. In this person's mind, there is mental defense mechanism to prevent acceptance.

People with this kind of thinking selects information that agrees with their own perception.

The negative effects of smoking weed underage age includes:
regular use
heart problems
trouble breathing
mental health issues
academic issues
lower life satisfaction