- logical proposition
- logical relation
- logical rule
- logical schema
- logical sequence
- logical structure
- logical sum
- logical symbol
- logical synthesis
- logical system
- logical term
- logical theory
- logical treatment
- logical truth
- logical type
- logical unit
- logical variable
- logical “and”
- logical “not”
- logical “or”
- logician
- logicism
- logicistic point of view
- logicistic school
- logic of belief