inform7/services/kinds-module/Figures/objects.txt

'new kind thing of object': ok
'new kind device of thing': ok
'new kind vehicle of thing': ok
'super of device': thing
'super of super of device': object
'super of super of super of device': sayable value
'join of thing and device': thing
'join of device and thing': thing
'join of device and object': object
'join of device and vehicle': thing
'join of thing and text': sayable value
'weaken thing': object
'weaken device': object
'weaken relation of things to texts': relation of objects to texts
'object <= text?': false
'object <= thing?': false
'thing <= object?': true
'device <= thing?': true
'device <= object?': true
'dereference number valued property': number
'dereference list of number valued properties': list of numbers