text: After all why do you think toothpaste companies say 9/10 dentist recommended the tooth paste? It's because the more dentists that agree with it make it more credible. Same thing with getting advice. Lets say you ask that one dentist that says the toothpaste is bad , now lets say you only asked him. Then you would think its a bad toothpaste and in reality its a good toothpaste, however you didnt ask any of the other dentist and stopped after one person.