I see in some of Paul Tillich's texts that he omits certain verbs, usually the verb sein or to be. However, when I searched on Google, I was unable to find any entries on this feature of German. What are the rules governing the omission of verbs from German sentences? What other verbs can you leave out of a sentence?
Der Fortschritt der wissenschaftlichen Erfahrung entscheidet. Er hat entschieden, dass die Erde ein schwebender Körper, keine schwimmende Platte, dass die fünf Bücher Mose aus verschiedenen Quellen, nicht von Mose stammen.
There you can see that he omits the "to be" from the dass clauses. Does anyone know when one can do this? I saw it in a Youtube video, where the video creator said that you can shorten sentences sometimes by leaving out the verb. I wasn't sure if there was more to it than that.