You are being fed flavored dirt and are told it's the most FABULOUS chocolate mousse! Do you believe your tastebuds or the words you heard?

Some totally depend upon and rely upon the words they hear from trusted sources. They ignore their senses, common sense being the most ignored and go with the words of very convincing others.  How long does such a charade last?  Till death do they part? How much dirt can you eat after all and still survive?