True or false No machine can be too small for humans to see because there would be no way to assemble it?

True. If a machine is too small for humans to see, it would be challenging to assemble it, as the components would likely be beyond our visual and manual manipulation capabilities. Additionally, the precision required for assembly at such a small scale typically necessitates specialized tools and techniques that humans cannot perform unaided. Thus, practical limitations exist regarding the assembly of extremely small machines.