Ideas of Fred Sommers, by Theme

[American, fl. 1963, Was at Columbia University, then at Brandeis University.]

green numbers give full details    |    back to list of philosophers    |     expand these ideas
3. Truth / B. Truthmakers / 5. What Makes Truths / a. What makes truths
Truthmakers are facts 'of' a domain, not something 'in' the domain
4. Formal Logic / A. Syllogistic Logic / 3. Term Logic
'Predicable' terms come in charged pairs, with one the negation of the other [Engelbretsen]
Logic which maps ordinary reasoning must be transparent, and free of variables
5. Theory of Logic / D. Assumptions for Logic / 4. Identity in Logic
Predicate logic has to spell out that its identity relation '=' is an equivalent relation
5. Theory of Logic / E. Structures of Logic / 1. Logical Form
Translating into quantificational idiom offers no clues as to how ordinary thinkers reason
5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / c. not
Sommers promotes the old idea that negation basically refers to terms [Engelbretsen]
5. Theory of Logic / E. Structures of Logic / 7. Predicates in Logic
Predicates form a hierarchy, from the most general, down to names at the bottom
7. Existence / D. Theories of Reality / 2. Realism
Unfortunately for realists, modern logic cannot say that some fact exists
7. Existence / E. Categories / 1. Categories
Categories can't overlap; they are either disjoint, or inclusive [Westerhoff]
19. Language / B. Reference / 1. Reference theories
In standard logic, names are the only way to refer