It could even be expressed as `(params message receiver)`, or `message; <params>.{{receiver}}` or whatever other syntax. But it's going to be more thoughtful t

It could even be expressed as `(params message receiver)`, or `message; <params>.{{receiver}}` or whatever other syntax. But it's going to be more thoughtful to explain what parts of programming or of software design or architecture are emphasised by different ways of arranging things. `receiver.message(params)` puts an emphasis that it's the receiver which receives and acts upon the message. The receiver will conform to some kind of interface with which we can interact. `sender.message(...)` seems completely bizarre to me. -- Some module's interaction with other things is where the interactions are defined? Sounds interesting if it works!