How "implicatum" fails to recognise Grice's genius

Handbook of philosophical logic - Google Books Result
Dov M. Gabbay, Franz Guenthner - 2002 - Philosophy - 368 pages
... way of obeying A (— the imp/icans) is a way of obeying B (= the implicatum). ... (ii) Although the principle of free choice permission fails to be valid ...
books.google.com/books?isbn=1402006659...

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While "implicatura" (in Latin, as used by Sidonius) or "implicature" as used by Grice does recognise a variant from 'implicatio' or 'implication', the term "implicatum" (also used by Grice, WoW:II) fails to do so!

So one is never sure, when reading 'implicatum' if _pragmatic inference_ (i.e. beyond truth-conditions) is meant. Or not!