 Philosophers commonly use a metaphor that suggests that the chain of an argument, say for the existence of God, is only as strong as its weakest link. Hartshorne rejects this metaphor on Peircian grounds. He replaces it by suggesting that various arguments for the existence of God—ontological, cosmological, design, etc.—are like mutually reinforcing strands in a cable, as detailed by the Hartshorne scholar Donald Viney.