Diagrammatic logic of existential graphs: A case study of commands

Ahti Veikko Pietarinen*

*Corresponding author for this work

Research output: Chapter in book/report/conference proceedingConference proceedingpeer-review

3 Citations (Scopus)


Diagrammatic logics have advantages over symbolic cousins. Peirce thought that logical diagrams (Existential Graphs, EG) are capable of "expression of all assertions", as our reason is no longer limited to the "line of speech" (MS 654). This paper points out one such value: the economy resulting from combining multi-dimensional diagrams with multi-modal features. In particular, EGs are well-suited for representing and reasoning about non-declarative assertions, such as questions (interrogatives, vert), commands (e.g., imperatives, vair) and the compelled (potent). An advantage over symbolic-logical counterparts is multi-dimensionality that entitles recognition of non-declarative moods in an instantaneous fashion: there is no need to attune to the phonetics of expressions. The paper suggest an application of diagrammatic logic of commands to the cases where (i) minimal reaction time to commands is of essence, (ii) a full comprehension of the meaning of imperatives ('search for their objects') is needed, and (iii) an effective discrimination of commands from other non-declarative moods is critical.

Original languageEnglish
Title of host publicationDiagrammatic Representation and Inference
Subtitle of host publication5th International Conference, Diagrams 2008, Herrsching, Germany, September 19-21, 2008, Proceedings
EditorsGem Stapleton, John Howse, John Lee
PublisherSpringer Berlin Heidelberg
Number of pages4
ISBN (Electronic)9783540877301
ISBN (Print)3540877290, 9783540877295
Publication statusPublished - 10 Sept 2008
Event5th International Conference on Diagrammatic Representation and Inference, Diagrams 2008 - Herrsching, Germany
Duration: 19 Sept 200821 Sept 2008

Publication series

NameLecture Notes in Computer Science
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349
NameLecture Notes in Artificial Intelligence
NameDiagrams: International Conference on Theory and Application of Diagrams


Conference5th International Conference on Diagrammatic Representation and Inference, Diagrams 2008
Internet address

Scopus Subject Areas

  • Theoretical Computer Science
  • Computer Science(all)

User-Defined Keywords

  • Commands
  • Diagrammatic logic
  • Existential graphs
  • Multi-dimensionality
  • Multi-modality
  • Tinctures


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