Absolute is the opposite of Dependent. Dependent is derived from Depend. Depend is related to Rely. Reliable is derived from Rely. 
you are likely to find Illness in/at/on Brain. Brain is related to Knowledge. you are likely to find Knowledge in/at/on Meeting. Session is a type of Meeting. 
Absolute <--Antonym--> Dependent --DerivedFrom--> Depend <--RelatedTo--> Rely <--DerivedFrom-- Reliable 
Illness --AtLocation--> Brain <--RelatedTo--> Knowledge --AtLocation--> Meeting <--IsA-- Session 