| Independent purposes and common resources | Scientific, commercial, human and cultural results can each be worthwhile while competing for one finite allocation. |
| Reuse and subject specificity | A shared operation can reduce repeated construction; its useful application may still require different premises, expertise, authority and feedback. |
| Common support and common dependence | Sharing can make maintenance affordable while creating a scarce supplier whose failure affects several branches. |
| Finite commitments and uncertain discovery | Work can be bounded and funded before its scientific answer or future application is known. That uncertainty does not justify an unbounded promise. |
| Current service and new capability | Development consumes people, attention and recovery capacity needed by current recipients. |
| Strong AI and the developed subject | Available AI can perform more work, but obtaining its output, developing a person, and developing a collective capability remain different results. |
| Plural characteristics and a decision | Unlike contributions need not share a score, yet their owners still have to choose what receives resources now. |
| Continuation and growth of obligations | A useful next problem can justify further development; success creates no duty to expand every branch indefinitely. |