Proof Mind is Fundamental and Matter Doesn't Exist

[Rational AKD]

Must they?  It's not my business to establish how they interact to you

tangible interaction was given in the example... thus that is the interaction established in the example.

Tangible interaction of substances certainly implies that -some- of those involved substances be tangible (at least insomuch as you appear to be using the term as a stand in for what is detectable), but you've yet to demonstrate that it requires both (or all- maybe there are 30..who would know?)

it's demonstrated by the definitional terms... tell me, can an intangible object tangibly do anything? look carefully now...

The only thing that's true -by definition- in your claim, is that a tangible -interaction- must be tangible, the interaction

right. so how can an intangible object have a tangible interaction? how can an intangible object perform any tangible function at all?

interaction- must be tangible, the interaction.....not all involved parties to it.

I guess you don't know the definition of interaction- "mutual or reciprocal action or influence." how can you have something mutual without both parties involved? how can you have a substance that influences without the other substance being influenced? to have interaction, both substances must be involved with the interaction. that's like saying you can have communication without a listener, or without a common language between two people.