Parallels / Contra-Parallels Primary Directions Truth Card

Historical Name

• Parallel
• Contra-Parallel
• later also Rapt Parallel

Mathematical Basis

• parallels in primary directions are not yet admitted in Moira as a generic point-target family
• the obstacle is mathematical, not cosmetic:
  • a parallel is a relational perfection in declination
  • it does not automatically determine one unique projected promissor point across all direction methods
• some historical examples, especially in the Ptolemaic zodiacal family, treat a parallel through oblique-ascensional equivalence rather than through a globally reusable target point

Current Moira Admission

• not admitted as a generic consumer-facing primary-direction target family
• names such as Sun Parallel and Sun Contra-Parallel are still intentionally rejected by the global target doctrine
• one narrow explicit branch is now admitted:
  • Ptolemy / semi-arc
  • in_zodiaco
  • relation doctrine parallel / contra-parallel
  • named preset surface:
    • PrimaryDirectionsPreset.PTOLEMY_ZODIACAL_PARALLEL
  • service-supplied PtolemaicParallelTarget
  • declination-equivalent ecliptic projection on the branch nearest the source longitude
  • current runtime validation now covers both:
    • parallel
    • contra-parallel
• one further narrow explicit branch is now admitted:
  • Placidian classic / semi-arc
  • in_mundo
  • relation doctrine rapt_parallel
  • named preset surface:
    • PrimaryDirectionsPreset.PLACIDIAN_MUNDANE_RAPT_PARALLEL_DIRECT
    • PrimaryDirectionsPreset.PLACIDIAN_MUNDANE_RAPT_PARALLEL_CONVERSE
  • service-supplied PlacidianRaptParallelTarget
  • current runtime admission is:
    • direct and converse, as separate explicit preset surfaces
    • promissor/significator pair-specific
    • proportional semi-arc / meridian-distance arithmetic
    • published worked-example fixture coverage for:
      • direct rapt parallel
      • converse rapt parallel
• the existing declination engine in moira/aspects.py remains valid for ordinary aspect detection, but it is not being re-labeled as a global primary-direction target law

Boundary

• Moira does not treat parallels as just another zodiacal aspect-point
• Moira does not fabricate a generic parallel point without a method-specific governing law
• the current Ptolemaic point is a derived computational realization of a relation class, not evidence that parallels are globally targets
• if parallels are later admitted, they should enter through one of two explicit paths:
  • a method-specific relational law
  • a worked-example-backed reconstruction narrow enough to define one unambiguous projected target

Epistemic Status

• verified narrow admission
• broader parallel doctrine still deferred pending explicit method-specific laws
• the family-level policy and branch classification now live in:
  • primary_directions_parallel_family_matrix.md

Why They Are Deferred

• the present evidence suggests that parallels belong to target doctrine and geometry doctrine at the same time
• that means they cannot be admitted safely as a generic target class alone
• the new Ptolemaic branch is admitted precisely because its governing law is explicit enough to stand on its own without pretending to solve the wider family