Implicit Junctions

Junctions were introduced to disambiguate any part of a Model where 2 or more Relationships have a common target or a common source (or both). This works well.

However in practical modelling it would be convenient if some specification defaults were established that defined an implicit Junction, so that the Junction itself needn't be shown, unless the modeler brings it explicitly into the View. I'm thinking for example that 2 or more Relationships (of the same type) arriving at the same target would be construed in the Model as an implicit OR and 2 or more Relationships leaving an Element would be construed as an implicit AND.

I suggest any reasonable convention that cuts down on the clutter of a View is helpful. I appreciate this may have implications for the Exchange Format.