Another type of fallacy assumption is when people assume that something will just continue without any check or balances. Or that something is acceptable because people did not object before to the progression of events up until now. We call this the “Slippery Slope Fallacy.”
Below is an example of a medieval proverb that is sound in its logic and not an example of a "Slippery Slope" fallacy even though it is often quoted to support such fallacies. Have a careful read of it and then compare it to the fallacy examples at the bottom of the article.