the mind > mental capacity > knowledge > conformity with what is known, truth > foundation in fact, validity > [noun] (41)
The quality of being well-founded on fact, or established on sound principles, and thoroughly… In general use.
Soundness, genuineness; solidity of position or status.
The quality or condition of being allowable (in various senses); permissibility, allowableness (of something).
Subcategories:
— true character, genuineness (10)
— a genuine thing or person (8)
— real nature (1)
— authenticity (9)
— making valid (5)
— historical truth (4)