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You can stick the base of base classes into IsA. For example, you you wanted to tell if an object in Workspace had a physical part associated with it, you could test with ClassName if it was a seat, platform, wedge, part, ext. or you could just say :IsA "BasePart". The basepart base class includes the terrain, so if you didn't want that, then you could test for exclusion. Here is a list of all the base classes:
http://wiki.roblox.com/index.php/Object_Hierarchy |