Logic is philosophical and relevant to daily life, even moment to moment.
"The ultimate standards of logical correctness are merely the everyday uses of ordinary language."
Is THAT statement merely an everyday use of ordinary language? If so, how can it even talk about ultimate objects used as universal criteria of truth? It's just language used a certain way, right?
You can often spot a grandiose self-referencing contradiction in its use of the word "merely".
Why would anyone, whose statements and thoughts are merely a way of using language, want to make statements about ultimate standards or criteria of anything?
The actual logical uses of ordinary speech are most obvious in the fact that ordinary conversation is what produced things like symbolic logic and even logic itself. And there are philosophical reasons for using ordinary speech in these ways.
Some say the way we use language is just accidental and has no philosophical intelligibility. But how then can language be used for such practical and theoretic efficiencies as intended goals and the construction of a system of philosophical concepts and terms?
What is properly or uniquely philosophical in being logical? What value is there in knowing logical techniques and procedures?
This line of questioning can be answered only by knowing something about the philosophical grounds and the importance of logical tools and techniques.
Constructing, analysing, and changing systems of thought is itself pre-theoretic, used much like breathing prior to any philosophical reflection.
Logical forms are about things, pertain to things, predicate something about some object, and that's why they're the natural tools for knowing things.
But how do logical forms intend?
Underlying all artificial languages is the necessary natural intuitive logic or common sense which is designed not just for scientists, scholars, technicians, and other specialists but for anyone who wants to understand reality.
Logic is the universal mind-tool correlated to an actual world. And even if one believes the world to be illusory, that illusion has to be treated as an actual world. And all issues remain.