Few objects are able to disgorge their behavior accurately. Aside from the issue of extraction, the idea has been suggested several times that some objects manifest their behavior. Some shrink would be sent a key to the object and if the builder of the object were willing, the shrink could attest to the behavior. The most severe practical problem is the format of the response. Machine code is awkward. Higher levels are practical only if the language the object is written in is familliar to the requestor of the behavior. A strength of Keykos is as a place for various languages to interact.