Do we have the same concept of 2? Is 1+1=2 true, or do we not actually have the same concept of 2 after all?[ /QUOTE]
How do you define same? I have a process going on in ny brain. That process behaves in such way that if you as me "1+1=?" I would probably answer "2". But I can be wrong and answer "3" instead or I can misunderstand the context and answer "10".
The concept of 2 is something specific to my brain but is probably similar to yours because: 1) we have similar background, 2) we are(probably) of the same species so our brainfunction is similar.
Logic, maths, science all depend critically on concepts being shared between people. If you want to declare concepts to be physical objects or forces, then you need to explain how they work.
Nah. That is the easy thing to do. Try to explain them as non-physical seems to be totally impossible.
There is a reason why so many philosophers are dualists. It's not because they somehow hate science, it's because they've actually thought about the problem.
It is because they have fundamentally misunderstood how meaning, reference and intention work. They look for objects where there are only behaviour/processes.