What Ben is saying here is that essentially all grammars: (Head-)phrase structure grammars (HPSG), dependency grammars (DG) and the CCG's are known to be mathematically isomorphic to one-another, with "well-known" algorithms that convert from one to the other.
That is .. if the grammars have been expressed in a sufficiently mathematical fashion for an algorithm to be developed for them. Most papers in linguistics are simply not that precise, for various historical and cultural reasons. There's also the "devil in the details" Just because you can translate an HPSG into a DG or a CCG, does not mean that the kinds of behaviors and relationships discussed in one system can be trivially converted into factual statements in another system. The focus of attention in these different systems is different, and I don't know of any (detailed) work which attempts to actually probe the isomorphism between these different systems, and how statements made in one system correspond to statements made in other systems. I think that this kind of filling-in-the-details will be necessary, and that, without it, the various different grammar camps will continue to engage in dogmatic warfare. --linas On Sun, Jul 9, 2017 at 6:21 AM, Ben Goertzel <[email protected]> wrote: > CCG is fairly straightforwardly mappable into link grammar; and our > "statistical" approach is based on using unsupervised pattern mining > (in a particular complex way) to induce a link grammar for a > language... > > So we (i.e. Linas and I especially) basically agree with CCG as a > formalism, but we want learned not hand-coded grammar rules... > > Also, the hand-coded link grammar dictionary is simply much bigger > and better than any existing CCG dictionary.... Someone could write a > script to transform it into a (complicated and ugly) CCG if they > wanted... > > -- Ben G > > On Sun, Jul 9, 2017 at 7:15 PM, Alex <[email protected]> wrote: > > Probably offtopic - while I am reading about OpenCog community efforts in > > NLP, I am quite suspicious about statistical methods. I think that the > only > > meaningful approach to the NLP ir the combinatory categorial grammars > > (Lambek calculus, Montague semantics) and this effort tries to translate > > natural language sentences into logical expressions - lambda calculus > > expressions. So - if there is connection between Schema as a language of > > lambda calculus, then CCGs are the way of translating NL sentences > directly > > into Scheme structures. Besides CCGs approach uses white box approach and > > understanding for the semantics of natural language, these semantical > > knowledge can also be encoded as the Scheme/OpenCog structures and can be > > learned of enhanced by time. > > > > Of course, raw statistical approach in the end can give the same results, > > but structured approach can be more feasible. Besides - statistical > approach > > yields results that are worth all or nothing. But CCG approach yields > > results that are improving step by step and such improving understanding > > reflects the human approach to the world and language - humans > progresively > > learns language, its syntax and semantics. I we have the slightest doubts > > about existence of the perfect understanding of the language then we > should > > also must have doubts about efficiency of the statistical approach. > > > > -- > > You received this message because you are subscribed to the Google Groups > > "opencog" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [email protected]. > > To post to this group, send email to [email protected]. > > Visit this group at https://groups.google.com/group/opencog. > > To view this discussion on the web visit > > https://groups.google.com/d/msgid/opencog/393b88c8-aadd- > 456c-bd84-eaac92b55fd8%40googlegroups.com. > > > > For more options, visit https://groups.google.com/d/optout. > > > > -- > Ben Goertzel, PhD > http://goertzel.org > > "I am God! I am nothing, I'm play, I am freedom, I am life. I am the > boundary, I am the peak." -- Alexander Scriabin > > -- > You received this message because you are subscribed to the Google Groups > "opencog" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/opencog. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/opencog/CACYTDBf38gt-tcuY9EQ7q3TtkLSUMKs% > 2B3PPH3rEH7FDDn%2BRmCg%40mail.gmail.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "opencog" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/opencog. To view this discussion on the web visit https://groups.google.com/d/msgid/opencog/CAHrUA35MkX7OHMk6M6Ym0N1h3PHQ4gLSamYM5VUiE%2BC3LmiyAA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
