Because of that the scale of Fahrenheit was different above the Freezing point of water and below, requiring to redefine the temperature at the reference points multiple times (and not by an insignificant amount)
The original definition of Celsius (centigrade) was reversed with 100 being the freezing point of water and 0 being the boiling point. I’d say a “non-insignificant” change.
The original definition is using three points:
Because of that the scale of Fahrenheit was different above the Freezing point of water and below, requiring to redefine the temperature at the reference points multiple times (and not by an insignificant amount)
The original definition of Celsius (centigrade) was reversed with 100 being the freezing point of water and 0 being the boiling point. I’d say a “non-insignificant” change.