A newly created theme is a copy of the "Default global data" theme and will generate the same results as this one as long as no filter is modified.

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/7a1ab117-f31a-4f73-acba-a77d4a60bc3a/Why_do_I_get_results_when_I_create_a_theme_and_havent_entered_any_filters_yet.gif