0001 Chris Sinha, writing from Hunan University, publishes another article on human evolution.  The journal is Interaction Studies (volume 19(2), 2018, pages 239-255).  The complete title is “Praxis, Symbol and Language: Developmental, Ecological and Linguistic Issues”.

The title of Razie Mah’s commentary is Comments on Chris Sinha’s Essay (2018) “Praxis, Symbol and Language”. The commentary is found at the smashwords website under the series: Buttressing the Human Niche.  Other vendors also sell the e-commentary.

0002 This blog complements the commentary.

0003 Sinha’s article covers from the start of the Homo genus, around two million years ago, to the speciation of Homo sapiens, around two-hundred thousand years ago. That is a lot of territory.

Several issues intertwine.  One is individual development (devo).  Another is a transition in natural selection (evo) from ecology-driven adaptations (eco) to adaptations driven by social interactions (socio).

0004 Sinha loves terminology.  He searches for a EcoEvoDevoSocio framework.

0005 What about Sinha’s EcoEvoDevoSocio framework?

0006 The outer terms, “eco” and “socio”, signify a broad arc of human evolution.

Adaptation by a line of apes starts with ecological adaptations.  For example, bipedalism is evolutionarily ancient.

However, the fact that bipedalism frees the hands for communicative gestures creates new opportunities.  A truly human niche appears.  One hominin can intentionally gesture to another.  The other hominin can interpret that gesture.

0007 The frontpiece of the title captures Sinha’s EcoSocio vision.  The praxis (or habits) of intentional manual-brachial gestures for communication proceeds from signaling to functional representation.

Functional representation metaphorically runs around the symbol, defined as a sign-relation whose sign-object depends on conventions, habits, laws and so forth.  The more that intentional manual-brachial gestures act as words, the more symbolic they become.

In this way, hominins become symbol-ready and capable of engaging in language.

0008 Allow me to further elaborate Sinha’s EcoEvoDevoSocio framework.

In the prior blog, the Eco-Socio bookends touch base with the title frontpiece of praxis, symbol and language.

0009 This implies that the EvoDevo inner coupling expresses the title endpiece of developmental, ecological and linguistic issues.

0010 Evo associates to phylogeny.  Phylogenesis consists of adaptations into a niche.  The human niche changes from one where ecology is the primary source of signification to one where symbol-ready hominins are the primary sources of signification.  

Devo associates to ontogeny.  Ontogenesis consists of alterations in DNA, genes, genotypes and phenotypes that permit the drastic shift in the primary source of signification.

0011 Sinha cleverly encapsulates the inner drama of phylogenic and ontogenic changes over evolutionary time(EvoDevo) within the outward motion from an ecology-centered Umwelt to a socially-centered Lebenswelt (Eco-Socio).

0012 Sinha’s EcoEvoDevoSocio framework associates to all the terms in the title of Chris Sinha’s Essay.

0013 Eco-Socio are bookends describing the long arc of time from the emergence of the Homo genus to the appearance of Homo sapiens.  At the start, signification primarily comes from the ecology.  At the end, significations primarily come from social interactions.

0014 EvoDevo are the twin tomes of phylogenesis and ontogenesis, bringing me to the truth-bearing fiction within Sinha’s narrative.

What is this fiction?

Ontogeny recapitulates phylogeny.

0015 Biologists have debunked this slogan, as fact.  But, it lives on as fiction.

Why?

It must be true, even though it is factually incorrect.

0016 How else can one draw a thread through these two terms: language and the human brain?

Language goes with phylogenesis.  As discussed in the masterwork, The Human Niche, plus its attendant commentaries, the biological capacity for language evolves in the milieu of hand talk.  Hand talk develops phylogenetically, from signaling, to functional representation, to symbolic communication, then to fully linguistic.  The adaptation of language occurs within the evolution of hand talk.

The human brain goes with ontogenesis.  The capacity to read ecological significations expands to reading intentional manual-brachial gestures.  Intentional gestures retain their semiotic qualities as icons and indexes as they become more conventional, habitual, lawful and so on.  They become more and more like symbols. The neural substrate in the hominin brain finds a way to process symbols.

0017 Ecological significations are icons and indexes.

Intentional manual-brachial gestures are perceived as icons and indexes, even though they increasingly operate as symbols.

0018 So, instead of the slogan, “ontogeny recapitulates phylogeny”, we can adopt the saying, “ontogeny intersects phylogeny”.

A traffic intersection belongs to both roads. So does the intersection of ontogeny and phylogeny.

0019 Chris Sinha’s essay is a contribution to a huge, obviously well-funded, academic project, led by Prof. Michael A. Arbib, of the University of California at San Diego.  An outline is presented in the same issue of Interaction Studies(19:1-2 (2018) 370-389).  The title is “The Comparative Neuroprimatology 2018 (CNP-2018) Road Map for Research on How the Brain Got Language“.

0020 The project’s slogan is a little humorous.

It’s like How the Birds Got Flight.

Does anatomy tell the tale?

To me, comparing the neural structure of the great apes, including models of our hominin ancestors, tells the ontogenesis side of the story.

0021 What about the phylogenesis side of the story?

The story of how the brain got language cannot be restricted to DNA, genes, genotypes, phenotypes and body development.  Phylogenesis cannot be ignored.  In this regard, Chris Sinha’s essay is crucial.  

The intersection of ontogeny and phylogeny re-capitulates the intersection between body development and natural history appearing in Speculations on Thomism and Evolution.

Chris Sinha adds weight to the natural history side, covering environment, ecology, niche, adaptation and natural selection.

0022 To this end, I suggest that the seventeen authors on this magnificent quest consider Razie Mah’s Comments on Chris Sinha’s Essay (2018) “Praxis, Symbol and Language”.  The contribution may be unexpected.  Nevertheless, it is properly attired.