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Because you add the project.
`incluce ':libraries:lib1:nestedlib1` adds three projects if they are not added already.
`:libraries`, `:libraries:lib1`, and `:libraries:lib1:nestedlib1`.

yep..someone pointed me at these docs that sort of clarify this non-intuitive behavior :slightly_smiling_face:
<https://docs.gradle.org/current/dsl/org.gradle.api.initialization.Settings.html>