Claim. abraham’s failure to cut the dove and pigeon in half (Gen 15:10) defiled the symbolic offering, because the dividing was the necessary structural act separating good from evil — and not cutting the birds was equivalent to handing the entire offering over to Satan, prolonging the providence by 400 years.
Elaboration. Per DP §3.1.2, God’s salvation work aims to restore the sovereignty of goodness by first dividing good from evil. This pattern recurs: adam divided into cain and abel; noah’s flood divided his family (good) from the rest (evil). Abraham’s instruction to cut the sacrifices was the same dividing-act at the symbolic-offering level. DP names four converging reasons the dividing was required: (1) to restore the Cain/Abel division; (2) to repeat the flood’s good/evil division; (3) to mark off a realm of good sovereignty from Satan’s universe; (4) to drain “the blood of death” inherited via fallen humanity’s blood-ties to Satan.
Leaving the doves uncut, all four conditions failed. Satan (“birds of prey descended upon the carcasses”) immediately seized the dove — the formation-stage sacrifice — and through it claimed the ram (growth) and heifer (completion), which depended on the formation foundation.
The consequence: the 400-year period set up to establish Abraham as father of faith was forfeited to Satan, and Israel’s 400-year Egyptian slavery became the restitution. Hence DP reads Gen 15’s “your descendants will be sojourners… oppressed for four hundred years” as direct consequence of the uncut-bird sin, not predestined.
See also. DP-distinctive against mainstream covenant-cutting scholarship reading the uncut birds as part of the standard rite, not a failure.