Update docs/src/introduction_to_catalyst/introduction_to_catalyst.md

Co-authored-by: Sam Isaacson <[email protected]>

Author: TorkelE

docs/src/introduction_to_catalyst/introduction_to_catalyst.md

@@ -156,7 +156,7 @@ underlying problem.
 
 
 !!! note
-    Above we have used `repressilator = complete(repressilator)` and `odesys = complete(odesys)` to mark these systems as *complete*. This must be done before any system is given as input to a `convert` call or some problem type. Models created through the @reaction_network` DSL (which is introduced elsewhere, and primarily used throughout these documentation) are created as complete. Hence `complete` does not need to be called on these models. An expanded description on *completeness* can be found [here](@ref completeness_note).
+    Above we have used `repressilator = complete(repressilator)` and `odesys = complete(odesys)` to mark these systems as *complete*, indicating to Catalyst and ModelingToolkit that these models are finalized. This must be done before any system is given as input to a `convert` call or some problem type. `ReactionSystem` models created through the @reaction_network` DSL (which is introduced elsewhere, and primarily used throughout these documentation) are always marked as complete when generated. Hence `complete` does not need to be called on them. Symbolically generated `ReactionSystem`s, `ReactionSystem`s generated via the `@network_component` macro, and any ModelingToolkit system generated by `convert` always needs to be manually marked as `complete` as we do for `odesys` above. An expanded description on *completeness* can be found [here](@ref completeness_note).
 
 At this point we are all set to solve the ODEs. We can now use any ODE solver
 from within the