[CESERH] IMACTIS Research Seminar. Images Today org. by DONDERO & D’ARMENIO (29/03/22) - Seance 8

[CESERH] IMACTIS Research Seminar. Images Today org. by DONDERO & D’ARMENIO (29/03/22) - Seance 8

by Frederik Stjernfelt and Dario Rodighiero · View the channel on PSI

Humanities, Social Sciences & Thought Science — General & History GTInterdisciplinary studiesGTDSemiotics
🎙 Frederik Stjernfelt and Dario Rodighiero 👥 178 📅 March 29, 2022 ⏱ 145 min 👁 58 📄 expert opinion 🧭 2026-10-09
Available in: English (current) Français

Keywords

peircediagrampropositionsemioticslogic

Summary

The video is the eighth session of the IMACTIS research seminar on images, organized by Dondero and D’Armenio, featuring two invited speakers. Frederik Stjernfelt, professor at Aalborg University, presents his work on Peirce’s conception of diagrams. He traces the historical roots of diagram–proposition connections in Peirce’s early logic formalizations, showing how Peirce generalized propositions as ‘dicisigns’ — multimodal signs that combine an index and an icon. Diagrams typically serve as predicates in such propositions. Stjernfelt elaborates several important distinctions: between diagram types and tokens, involving the process of ‘precission’; between diagram experiments and real experiments; between explicit and implicit diagrams; and between corollarial and theorematic diagrammatic reasoning. He illustrates these ideas with examples including the London Underground map, which functions as a large dicisign. The second speaker, Dario Rodighiero from Harvard University, was scheduled to discuss the lemniscate of data visualization from an actor-network perspective, but the transcript provided does not include his presentation. Overall, the seminar offers a deep academic analysis of Peirce’s semiotics and diagram theory, relevant to philosophy, logic, and visual communication.

175 words

Critical Evaluation

Value of the Information & Strength of the Argument

The value of the information is high: Stjernfelt provides a detailed, well-structured exposition of Peirce’s diagrammatic reasoning, supported by direct references to Peirce’s texts and historical context. The argumentation is rigorous, showing how diagrams are essential to logic and cognition, and he defends a functional definition of propositions that includes non-linguistic signs. He also offers novel insights by systematizing distinctions that are only hinted at in Peirce’s work, such as the role of co-localization in anchoring diagrams to objects. The examples (e.g., Euclid, Euler diagrams, the tube map) effectively illustrate abstract concepts. However, the discussion is limited to theoretical exposition without empirical validation, and the second presentation is absent from the transcript, which slightly reduces the overall completeness.

Scientific Rigor, Source Quality, Title Accuracy

The scientific rigor is exemplary: Stjernfelt meticulously cites Peirce’s original texts and historical sources, and his own book ‘Diagrammatology’ is a recognized contribution. The sources are clearly identified, and the reasoning is transparent. The title accurately reflects the seminar session’s content, explicitly naming both speakers and the event. No external links are provided in the description, but the presentation itself serves as an expert discourse. The audience appears to be academic, and the level of technicality matches the context. No public comments are available for analysis, so no tendencies can be inferred.

225 words

Title / Content Match

The title accurately describes the eighth session of the IMACTIS research seminar, listing the two invited speakers and their topics, matching the video content.

Quality & Reliability

8/10

The seminar presents rigorous academic content based on primary sources (Peirce's writings) with clear conceptual distinctions and argumentation, though not all claims are formally verified.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Contribution & Novelties

The main contribution is a systematic clarification of Peirce’s diagram theory, particularly the functional definition of dicisigns and the role of diagrams as predicates. Stjernfelt introduces distinctions uncommon in the literature, such as explicit vs. implicit diagrams and the importance of co-localization. This advances understanding beyond typical textbook accounts.

Pour aller plus loin :

  • Charles Sanders Peirce — Overview of Peirce’s life and semiotic theory, fundamental context for the discussion.
  • Diagrammatic reasoning — General concept of reasoning with diagrams, closely related to Stjernfelt’s topic.
  • Extended mind thesis — Theory by Clark and Chalmers that Stjernfelt mentions as relevant to diagrammatic thinking.

101 words

Radar Profile

The profile shows high scores in information quality and technical depth, with equally strong reliability, reflecting a dense academic presentation. The quantity of information is substantial but not maximal due to the absence of the second speaker. Overall, the radar is well-balanced toward rigorous scholarly content.

Reliability 8/10