[If you were out walking and on the ground somewhere you found a flat, roundish sort of thing with hard shiny skin and a large bit of hard, transparent skin on one side and behind the transparent skin you saw two in-axis flagella turning about the center of the transparent skin at different but clearly related rates and regularly crossing over some markings in a roughly circular pattern on the tissue backing the transparent skin and on one side of the transparent skin there was another shorter flagellum spinning quite quickly in a stuttering motion and the thing was making a regular clucking sound, what would you conclude?]

I'd probably conclude that the object was designed by an intelligent designer.