 A great number of philosophers have found Bradley’s regress arguments to be compelling as stated. Some, in fact, have taken the regress arguments to be so threatening, that they have concluded that only non-relational ties might be able to unify qualities. Strawson (1959: 167–170), for instance, has appealed to non-relational ties such as instantial tie and characterizing tie to unify a particular with a sortal (such as dog) and characterizing universal (such as wisdom) respectively. He thought of these ties as being more intimate relators than ordinary relations as well as allowing for greater heterogeneity between the terms they bind. Bergmann (1967: 9) famously appealed to a non-relational tie he called “nexus” and which he introduced to tie the qualities directly, without mediation. Armstrong (1978: 110, 1989: 109) too embraced something he called a “non-relational fundamental tie” of instantiation.