s723.py

from research import *
s=begin(723,'Clarify the primary Rounded backbone continuation','How does the admitted1400 terminal leg continue the primary12026 backbone to14726?',{'primary_reversed_components':[[5610,5010],[7190,3430]],'original_terminal_leg':1400,'anchors':[1406,6],'separate_refinement':13016},['Latest File52c §3.4; integrated-draft math review'])
third=inv(1400); results=[6+sum(row)+third for row in [[5610,5010],[7190,3430]]]
finish(s,{'single_pass_terminal_image':third,'Nativity_endpoints':results,'net_change_from12026':results[0]-12026,'explanation':'Anchor moves1406→6 while the new1400 source leg contributes its single-pass image4100; net+2700.'},'The14726 continuation belongs to the primary12026 backbone: changing the anchor subtracts1400 while the new reversed leg adds4100. The13016 refinement is a separate branch. This explicit calculation removes an ambiguous antecedent in the draft without introducing a second reversal.','Apply the final three clarity refinements and freeze the publication draft.',{'single_pass':third==4100,'both_branches':results==[14726,14726],'net_shift':4100-1400==14726-12026==2700})