How do I know if multiplexer is working?

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Tags

1. #needs
2. #detect
3. #inputs
4. #should
5. #output
6. #logic
7. #opposite
8. #toggled
9. #channel
10. #shortages
11. #channels
12. #digital
13. #other
14. #function
15. #level
16. #between
17. #selected
18. #multiplexer
19. #changes