Ideas from 'A Pragmatic Conception of the A Priori' by C.I. Lewis [1923], by Theme Structure
[found in 'Pragmatism  The Classic Writings' by Peirce,James,Dewey etc (ed/tr Thayer,H.S.) [Hackett 1982,0915145375]].
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5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
9358

There are several logics, none of which will ever derive falsehoods from truth

5. Theory of Logic / B. Logical Consequence / 7. Strict Implication
9359

Russell's implication means that random sentences imply one another

5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle
9357

Excluded middle is just our preference for a simplified dichotomy in experience

5. Theory of Logic / F. Referring in Logic / 1. Naming / a. Names
9364

Names represent a uniformity in experience, or they name nothing

10. Modality / A. Necessity / 11. Denial of Necessity
9362

Necessary truths are those we will maintain no matter what

12. Knowledge Sources / A. A Priori Knowledge / 7. A Priori from Convention
9365

We can maintain a priori principles come what may, but we can also change them

18. Thought / E. Abstraction / 2. Abstracta by Selection
9361

We have to separate the mathematical from physical phenomena by abstraction

26. Natural Theory / D. Laws of Nature / 8. Scientific Essentialism / a. Scientific essentialism
9363

Science seeks classification which will discover laws, essences, and predictions
