To be able to date a feature, there must be a trend. And for that you need a lot of examples. So Oresme does not help us much.
However, the Zodiac does not allow for a as wide a range of a century. Based on the clothing (a very powerful marker - fashion) you can narrow it down to 30 years, or 50 if you count outliers.
It's not because we are not, and will apparently never be, "experts", that we may not rely on our own observations. This reminds me of medieval times when people were encouraged to distrust their own eyes when they observed something that was in conflict with scripture.
However, the Zodiac does not allow for a as wide a range of a century. Based on the clothing (a very powerful marker - fashion) you can narrow it down to 30 years, or 50 if you count outliers.
It's not because we are not, and will apparently never be, "experts", that we may not rely on our own observations. This reminds me of medieval times when people were encouraged to distrust their own eyes when they observed something that was in conflict with scripture.