Signal and Noise with every day examples

Question

Yesterday a friend asked me what is a signal and noise. When I described him he wasn't satisfied and he told me to give him an everyday example. What kind of example would you use to describe them as simple as possible?

Answer 1

Some "real world" examples:

1. Hide and Seek.
2. Where's Waldo?
3. Needle in a haystack
4. Discovering exoplanets
5. Camouflage
6. ICBM launch detection
7. Predator/Prey interactions

Answer 2

The signal is the truth. The noise is what distracts us from the truth.

https://www.predig.com/whitepaper/reducing-signal-noise-practice https://en.wikipedia.org/wiki/Signal-to-noise_ratio