Why The Hell Do I Need Types? Because Fahrenheit can't be less than −459.67

While the general concept is valid, the specific example in the headline relies on the idea that negative absolute temperature cannot exist, which is false. [1]

Perhaps more significantly, the article could use some examples of how different approaches to typing solve this problem, and discussing pros and cons; "not all numbers are valid for all numeric-valued variables" is a fairly shallow observation standing on its own.

[1] See, e.g., http://www.quantum-munich.de/research/negative-absolute-temp...