Re: [isabelle] Isabelle Foundation & Certification (answer to Makarius)

Sorry, a couple of further brief notes: 

>> This proper distinction also explains, why typedefs were not treated in the past, because it is hard to understand them in generic Isabelle/Pure, without an unfriendly takeover of the framework by HOL troups.

It is of course impossible. We have to let the HOL troops in at this point, there is no way around this.  

>> A few more notes on the paper: I actually liked the "Inconsistency Club" versus "Consistency Club", although it is hard to define that boundary. Just a single Boolean value to measure the reliability and robustness of a 
>> proof assistant in black or white is a bit lacking. Apart from shades of grey, such a measure desparately needs more than one dimension.

"Consistency Club" here does not refer to bullet-proof systems, but to formal efforts of partly ensuring consistency (whatever that means :-)  ). In particular, this club does not contain theorem provers, but formal developments.  

All the best, 


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