Full Idea
Given what heat is and what water is, it is literally impossible for water to be heated beyond a certain point at normal atmospheric pressure without boiling.
Gist of Idea
Given the nature of heat and of water, it is literally impossible for water not to boil at the right heat
Source
Thomas Nagel (Panpsychism [1979], p.186)
Book Reference
Nagel,Thomas: 'Mortal Questions' [CUP 1981], p.186