No, i stand by my original statement. I said it would be “off by” as in the “error will be” so the difference is the important bit to calculate that. There are a lot of ways to correctly do the math though

Thank you for your service. It’s super important for every internet comment to contain every pedantic detail every time

Yes,you can use the tire size information to calculate the circumference of the stock and the new tires. The speedometer will be off by the same ratio as the difference in circumferences. If the new tires are already installed and you don’t like geometry, use your gps to check the accuracy of the speedo at a few speeds

That’s actually more of a doctrine that is made up by the organization and less something explicitly stated in the book. There probably are some psalms or other references that use the word (translated as) “unchanging”, but in context, the original audience would probably not have interpreted it in the same way. Think God’s love and power will never fail, not God will literally never experience anything or change. In the 10 commandments story, Moses has a conversation with god and changes his mind.