Can it be argued that water always boils at 100 degrees?

Of course not. Water boils at a temperature of 100 degrees only if it is in normal conditions.
When the pressure increases or decreases (for example, when you go up a mountain or go down a mine), the boiling point of water also changes. But the difference is almost always minor.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.