There's many a true word said in jest. Like this passage from Red Dwarf:

> Mr and Mrs Rimmer were very religious, taking the Bible scriptures at face value. The Hoppists were primarily concerned with a particular verse from the New Testament. St. Paul's first epistle to the Corinthians, chapter 13, verse 13 had been misprinted in a certain edition of the Bible. In their version, the verse read "And now these three remain: Faith, Hop and Charity. But the greatest of these is Hop".

> The Hoppists took this literally and insisted that their followers spent every seventh day hopping. They would hop to church, hop through the service and then hop home again. The Rimmers even served their Sunday lunch whilst hopping, causing them to wear protective clothing to avoid burning themselves.

This is obviously a joke but there's load of examples of people getting hung up on seemly minor details like that.

E.g. The Umbilicus Adami discussion. If the bible is literal and God made Adam then Adam didn't have a mother. So that leads to the question, did he have a belly button?

If he didn't have a belly button was he human?

It sounds ridiculously trivial but people have died over that, which is itself even sillier.