1. Carpenters don't trim.
Woodworking is a very popular job in rural areas. I think it is compared with the current civil servants, but as a carpenter, you must have skills. If you only know the basic skills, you will probably be deducted a lot of wages and waste a lot of natural materials, and you are not worthy of the title of carpenter!
Therefore, when sawing wood, we must first analyze and measure the size, and then leave the size to be sawed longer according to the data. This is a real carpenter and a real artist. The sawed finished or semi-finished products are also perfect.
Carpenters rarely cut materials like saws, because they know that poor sawing or different sizes of materials will bring a lot of trouble to the follow-up work, so according to their past experience, the sawed materials will be longer than the actual size.
I think the implication of this sentence is to tell us not to be too rigid, to be flexible and to leave room!
Butchers don't kill pigs with five claws.
It is common for butchers to kill pigs with knives, but they dare not kill pigs with five claws, because ordinary pigs have four claws, and pigs with five claws become an alternative. It is said that this kind of pig can't be killed. Some people think it's ominous, so it won't be so unlucky when it's released. Others think it is a lucky star, so treat it well and never kill it. If we kill it, it will bring disaster to ourselves and the rest of our lives will be destroyed.
I think this is pure superstition. Even five-claw pigs are normal. We should believe in science. Everything in the world has variation, so we need not be afraid. If you really dare not eat, you'd better not kill. Don't think too much and scare yourself to death.