Final answer:
Claims like "I know how to do that" refer to subjective procedural knowledge or 'know-how,' but can contain objective elements if the ability is demonstrable.
Step-by-step explanation:
When someone says "I know how to do that" or "I can't do that because I don't know how," they are referring to procedural knowledge, or 'know-how,' which is their personal ability to perform a task. This can be subjective, as it pertains to the individual's skills, experiences, and self-awareness. However, the statement "I know how to do that" can also have an objective element if the individual's capability can be demonstrated or proven (for example, by performing the task successfully).
The truth of statements, unlike personal abilities or experiences, does not have degrees; a statement or proposition is either true or false—objectively. For instance, the number of blades of grass on the White House lawn is a fact that has a true and precise number, even if it is not known to us. This propositional knowledge is much less subjective, as it refers to facts that are either true or false, regardless of personal belief.
Thus, while claims about one's own knowledge and capabilities can contain subjective elements based on the individual's perception and self-assessment, the objective truth or falsity of a proposition is not relative to an individual's belief.