Hume, [30]

Intellectualism, [44]

James, William, [44]

Kant, [26], [27], [42], [73]

Meinong, [84]

Pierce, C. S., [44]

Plato, [11], [44], [67], [68], [74]

Pluralistic Realism, [24]

Poincaré, Henri, [54]

Pragmatist Theory of Truth, [55]