Discourse is a synonym of Discussion. Discussion is derived from Discuss. Discuss is related to Explain. 
Favorable is a synonym of Good. Learning can cause/lead to Good. Learning can be Free. 
Discourse <--Synonym--> Discussion --DerivedFrom--> Discuss <--RelatedTo--> Explain 
Favorable <--Synonym--> Good <--Causes-- Learning --HasProperty--> Free 