Because We've Always Done it This Way

There was a great story on the radio:
A woman had been taught by her mom that the best way to cook a pot roast is to cut the end off before putting it in the pot. She was curious as to why, so she asked her mom. Her mom didn’t really know the answer, she was taught that by her mom, so she decided to ask her mom. The grandmother’s answer? “Because it wouldn’t fit in the pot otherwise”.
Because-we’ve-always-done-it-this-way is never a good answer.