Complex design.
Inner Life Of A Cell - Full Version.mkv
https://www.youtube.com/watch?v=yKW4F0Nu-UY
How do we know it is design? Because it uses all the mechanisms inside the things that we design, plus a whole lot more. In addition, it is more highly miniaturized than we can make things of complex operation that is this complex. In fact, the complexity and miniaturization is so great, that the designer would only fit our definition of "God." And indeed, our definition is extremely weak when compared to what God really is.
If complexity in the universe is something that comes by accident or randomness, then that is why we aren't getting anywhere near as great as this video complexity, in our design of things, right? After all, we don't use randomness when we design. And few of our great designs come about by accident. But when they do, they can't hold a candle next to the midday sun with regard to the design of nature.
How do you know that we designed them, tho?
If you can't even explain what your "them" is, how is anyone supposed to answer your question? Since you are afraid to express yourself clearly, for fear that you won't be able to respond against an answer appropriately, why not simply accept the fact that there is design in everything? - design, indicating that there is a Designer.
Your argument says that we know plants or rocks are designed because it uses the mechanism inside the things that we design. Does a plant use the mechanism inside of a bottle of water? How does your argument work exactly?
"Does a plant use the mechanism inside of a bottle of water?" Some of them, especially if you grow the plant along with the water inside the bottle. What are you even talking about?
Your argument says we know plants, rocks, planets are designed because it uses the mechanism inside the things that we design. We designed water bottles, what's the mechanism of a water bottle and how does it relate to the other things you claim god designed?