Compare the textbook’s three equivalence examples:
Form VIICorresponding verbBook-specific sense
اِنْبَلَجَبَلَجَWide space between the eyebrows
اِنْحَجَزَأَحْجَزَArrival in the Ḥijāz
اِنْحَصَدَ الزَّرْعُأَحْصَدَ الزَّرْعُCrop reaches harvest time
Each comparison is a particular lexical relationship. It does not make all Form VII verbs identical in meaning to Form I or Form IV, nor does it equate correspondence with a cause-and-result relation.