I think a comma would make it less ambiguous. Starting that single though with "The" indicates to me that you don't think those are two different ideas. Compa

I think a comma would make it less ambiguous. Starting that single though with "The" indicates to me that you don't think those are two different ideas. Compare: the idea that inheritance is really good idea and belongs everywhere. With: the idea that inheritance is really good idea. and belongs everywhere.