Arguments against materialism

[dollar coin]

I think it'll be nice to have some compiled list of arguments and questions against materialism that can be used in philosophical talks.

Could you please state yours?

Questions:

Is there any way to verify that an object exists if you are not observing it?

If you think an unobserved object can be verified by its effects on observed objects, how can you verify that the effects come from the unobserved object?

If somebody tells you they have observed the unobserved object, how can you verify that they have?

If you cannot verify it, why would you believe them?

(Source: A Course in Consciousness by Stanley Sobottka)

[Sciborg]

I don't know if they are "my" arguments but I did compile a list here:

https://groups.google.com/forum/#!topic/metaphysical-speculations/iwL5sReWWXE%5B1-25%5D