#22 add warning/error when is a meant as subsump

[Anonymous]

Because in natural language we are used as saying things like 'a Rapid is a Topographical Object' which is a concept subsumption, we should provide a warning when trying to enter a sentence 'Rapid is a Topographical Object', because this is interpreted as a declaration of a new instance. If concept 'Rapid' has been defined, there should be a warning, suggesting to change this to 'Every Rapid is a kind of Topographical Object', which is the correct rabbit sentence for the subsumption.

[Ronald Denaux]

Increased priority as this is something that happens fairly often and the current error message is insufficient to figure out that you forgot the 'Every' keyword...