group-7. mental world what is cognition? cognition : understanding and trying to make sense of the...
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What is Cognition?Cognition :
Understanding and trying to make sense of the world
Information processingDevelopment of concepts
The mental functions, mental processes and states of intelligent entities with focus on:comprehension, inference,decision-making,planning and learning etc.
CognitionCerebral Cortex
Seat for cognitionHow is Cerebral cortex able to do what it is
able to do?Fuzzy explanations No clear cut perspective in exact terms
Introducing Confabulation TheoryA discrete insight into possible mechanism of
thought
Confabulation TheoryProposed by Robert Hecht-NielsonAll human cognition and behavior based on
one simple, non-algorithmic procedure that has been named confabulation
All aspects of cognition carried out using: a single type of knowledge and a single information processing operation
called (confabulation)
RelevanceRadical novel approach
First-of-its-kind concrete modelIssuing deeper insights into process of
cognition Augmenting present
Artificial intelligence knowledge discovery knowledge management
RoadmapCognitive World Object RepresentationKnowledge LinksConfabulationThe Mathematics of Cogent ConfabulationThe Origin of BehaviourConclusion
Cognitive World Object RepresentationCerebral Cortex
4000 discrete, localized, disjoint patchesThalamocortical Module
cortical patch and first-order thalamic zone uniquely paired by reciprocal axonal interconnection
Moduleone attribute of an object of mental world
Cognitive World Object RepresentationHow are these modules used?Make groups of 60: symbolsModule may consist of thousands of neuronsSymbol: one possible descriptor of an
attributeOne neuron may belong to more than one
symbolsSymbols have to be permanent
What is Knowledge?Knowledge accumulates in discrete unitsKnowledge link or knowledge unit is an
axonal linkage between source symbol and target symbol
Source and target symbols belong to different modules
Formation of knowledge linksTwo symbols become co-active to send out
signalsSynapses are strengthened in the process of
learningPermanent strengthening during sleepBillions of knowledge linksHumans and animals are 'smart’
ConfabulationOne and only one information processing
operationLocalizedWinners-take-allSymbol with highest total knowledge link
input is conclusion of confabulation
Implications of Knowledge LinkSource symbol neurons send signals to
millions of transponder neuronsOnly few thousand transponder neurons
become highly excited10 % of the target neurons receive signals
from multiple transponder neurons
CogencyAristotelian model : An appealing model for
cognition : p(ε|αβγδ)Wrong modelAlternate model : Cogency : p(αβγδ|ε)α,β,γ,δ : Assumed factsε : Conclusion
Cogency TheoremsThm 1: If αβγδ => ε exclusively, then
maximization of cogency produces one and only one answer ε
Aristotelian logic information environment: maximizing cogency gives logical answers
Cogency Theorems• Cogency calculation : only in trivial situations• Confabulation Product : p(α|ε).p(β|ε).p(γ|
ε).p(δ|ε)• Thm 2: [p(αβγδ|ε)]4 =
[p(αβγδε)/p(αε)].[p(αβγδε)/p(βε)]. [p(αβγδε)/p(γε)].[p(αβγδε)/p(δε)]. [p(α|ε).p(β|ε).p(γ|ε).p(δ|ε)]
• In non-exceptional cases, [p(αβγδ|ε)]4≈C*[p(α|ε).p(β|ε).p(γ|ε).p(δ|ε)]
Confabulation ExamplesSome examples from test
She could determine (whether, exactly, if, why)If it was not (immediately, clear, enough, true)Earthquake activity was [centered]For lack of a (unified, blockbuster, comprehensive,
definitive) A lack of (urgency, oxygen, understanding)Regardless of expected [outcome, length]
Automatic emergence of semantics and grammar
Why Cogency and not Baye’s Law?p(λ)=0.01; p(ε)=0.0001; p(αβγδ|λ)=0.01;
p(αβγδ|ε)=0.2p(αβγδ|ε)= 20 * p(αβγδ|λ)p(λ |αβγδ)= 5 * p(ε|αβγδ)
Baye’s Law => λCogency => ε
Quiz! (For those who are sleeping)Quickly select a next word for each of the
following:Company rules forbid takingMickey and Minnie wereCapitol hill observers arePaper is made fromRiding the carousel was
Why Cogency and not Baye’s Law?Typical answers :
NapsHappyWonderingWoodFun
‘the’ also viable : Baye’s law
Conclusion-Action Principle: Origin of BehaviorEvery time a confabulation operation on a module
reaches a conclusion, an associated set of action commands are launched
Winner of a confabulation competition employs skill knowledge to launch an action
Skill knowledge, and skill learning are not parts of cognitive thinking
Hindering BlocksConceiving and then precisely defining a
confabulation architectureConceiving and then precisely defining the
thought processesConceiving and executing an appropriately
staged sequence of learning opportunities
ConclusionA new dimension to the mechanism of
thoughtBased on Cogency (refutes Bayesian model)If proved correct
Better insight into human cognitionWill redefine the outlook towards various AI
problemsRadical improvement in present ML techniques
ReferencesRobert Hecht-Nielson, Cogent Confabulation,
Neural Networks Letter, 2004Robert Hecht-Nielson, Confabulation Theory:
A Synopsis, Institute for Neural Computation, 2005
Robert Hecht-Nielson, The Mechanism of Thought, International Joint Conference on Neural Networks, 2006
scholarpedia.org/confabulation
ThanQ“Animal cognition maximizes cogency, and in
a non-logic environment, cogency maximization implements what I call the ‘duck test.’" - Robert Hecht-Nielson
“There must be some event that triggers every behavioral event, and it had to be the same in every instance, whether we're thinking, moving, or whatever." - Robert Hecht-Nielson