LOGIC is all I need...
Morality and all of its associated ideals are rooted entirely in the presupposition some higher power defines what is correct for human behavior.
That is a bullet proof syllogism and it can be tested with truth tables in prepositional logic or with Venn diagrams in categorical (Aristole's) logic.
You are free to define words as you will. And using your definitions of choice, you can emit an unlimited number of statements that are true by definition.
Yes, in the sense that, if you were afflicted with scurvy, vitamin C would be all you need.