Definitions
1,059 definitions · page 1 of 23
Thoughts are objects, not identity
discrete cognitive entities that can be separated from the identity of the thinker; a person can observe, craft, version, and evaluate their own thoughts as external material
Uncaptured thoughts
novel cognitive signals that arrive as fleeting signals and systematically degrade in memory within seconds without a capture practice, with 42% degradation occurring within 20 minutes according to Ebbinghaus's forgetting curve
Externalization
the act of transforming internal emotional states from vague, unmanageable experiences into precise, labeled, written objects that can be examined, tracked, and acted upon deliberately
WYSIATI
the cognitive bias where people treat available information as complete and determine confidence based on the coherence of the available story rather than the quantity or quality of supporting evidence, with the system that would detect gaps being the same system that has the gaps
Capture
the cognitive process of externalizing thoughts and ideas from working memory into an external medium for preservation and future processing
Monitoring
the upward communication channel in metacognition where cognition about cognition is perceived, representing the signal that tells you 'I don't actually understand this' or 'I'm getting emotional about this decision'
Control
the downward communication channel in metacognition where actions are taken in response to monitoring signals, such as 'I need to re-read this more carefully' or 'Let me step back and separate my feelings from the facts'
Cognitive offloading
the use of physical action to alter the information processing requirements of a task so as to reduce cognitive demand
Shelf life of a thought
the rate at which a thought decays and becomes unrecoverable, which varies from minutes for contextual insights to weeks or permanent for reference facts
Zeigarnik residue
the persistent sense that you had something important (a task-specific tension) without the actual content of the insight, which continues consuming working memory without delivering usable information
Capture habit
the reflexive, automatic behavior that externalizes ideas the moment they arrive, consisting of a cue (trigger), routine (behavior), and reward (reinforcement) that forms a neural pathway requiring no willpower or decision-making
Keystone habit
a foundational behavior that, once established, cascades into other behavioral changes across seemingly unrelated areas by restructuring the conditions that make other outcomes possible, rather than just producing its own outcome
Internal monologue
the compressed, lossy cognitive process that represents thoughts through abbreviated, predicative, semantically condensed fragments rather than faithful recordings, systematically omitting subjects, context, nuance, counterarguments, emotional metadata, and uncertainty markers while running known distortion patterns that make it unreliable as a high-fidelity representation of actual thinking
Self-observation: metacognitive monitoring
Observation: the cognitive act of attending to and monitoring one's own thinking that necessarily alters the content and emotional charge of the thought being observed through the engagement of prefrontal regulatory circuits that modulate limbic activation, making the observer and observed part of the same system rather than separate entities
Confusion
the gap between what you think you understand and what you can write down clearly, which reveals the exact contours of your misunderstanding and serves as diagnostic information
The illusion of explanatory depth
the phenomenon where people rate their understanding of everyday devices highly but experience a significant drop in self-assessment when forced to articulate detailed explanations, revealing shallow knowledge that was masked by the feeling of understanding
Review
the cognitive operation that transforms captured material into usable knowledge through evaluation, connection, and decision-making processes
Capture system
the integrated infrastructure of multiple capture channels and a single consolidation point that prevents loss of cognitive raw material
Atomic note
a note that captures exactly one idea, is self-contained enough to be understood without its original context, makes one assertion, develops one concept, or captures one argument, and can be linked to, referenced from, and embedded in any context where its single idea is relevant
Unique identifier
a stable, distinct address assigned to an idea or information resource that enables precise referencing, linking, and retrieval without ambiguity, regardless of changes to the idea's title or content
Decomposition
the cognitive process of breaking down complex ideas, systems, or concepts into smaller, more manageable components to reveal hidden complexity, dependencies, and gaps in understanding, thereby making the actual complexity visible and actionable
Illusion of explanatory depth
the cognitive bias where people overestimate their understanding of familiar concepts or systems, believing they can explain them fully until they attempt to break them down into component parts, at which point the gaps in their knowledge become apparent
Atomicity (property): cognitive objects
Atomicity: the property of cognitive objects that makes them self-contained, independently understandable, and capable of being recombined with other atomic objects to generate novel insights or structures that monoliths cannot produce
Precise naming
the cognitive act of creating self-contained, declarative labels for ideas that convert fuzzy intuitions into findable, retrievable, composable objects and fundamentally change what can be thought about by establishing clear conceptual boundaries
Evergreen note
a self-contained, precisely named cognitive object that functions as a conceptual API, providing a complete, actionable claim that can be referenced, linked, and composed with other ideas without requiring the full content to be read
Question
a well-formed question that stays open and functions as a cognitive tool, organizing attention, generating ongoing cognitive tension, and directing future inquiry rather than simply closing a loop.
Definition
an operational definition that specifies the precise, observable conditions under which a term applies, functioning as a load-bearing structural element in reasoning that shapes every conclusion built on top of it.
Duplication
the epistemic signal that identical or highly similar structural patterns have been recorded in multiple locations without linking to a shared abstraction, indicating that a pattern has been recognized but not yet named
Abstraction
the cognitive process of extracting and naming a shared structural pattern from multiple concrete instances, creating a concept that can be referenced, refined, and composed with other concepts, enabling knowledge to compound in value
Atomicity (practice): decomposing ideas
Atomicity: the practice of decomposing ideas into discrete, independent units that can be independently understood, linked, and reused, where the goal is incremental improvement rather than perfect adherence to a fixed rule
Ubiquitous capture tools
capture tools that are available in every context where thinking occurs — desk, commute, shower, conversation, bed — such that no gap exists between where thoughts arise and where they can be externalized within seconds
Single thought inbox
a single, append-only destination where every captured thought enters and which is processed regularly to zero, functioning as a waystation rather than storage where all unprocessed thoughts accumulate until decision-making occurs
Open loop
an active mental representation of an incomplete task or commitment that continuously consumes working memory and creates cognitive tension until externalized into a trusted system
Processing
the cognitive operation of deciding what to do with each item — specifically answering 'What is this? Is it actionable? What is the very next physical action?' — before organizing that item into a knowledge management system
Batch processing
the cognitive infrastructure defense strategy that accumulates interruptive items and processes them in dedicated time windows rather than handling each item as it arrives, thereby protecting cognitive depth and preventing attention residue
Attention residue
the structural property of human cognition where cognitive threads from an unfinished task compete for attention bandwidth during subsequent tasks, creating a hard floor on task-switching costs that preparation cannot eliminate
Context-dependent memory
the structural constraint on human memory where retrieval cues are effective only if they were encoded alongside the original memory, with conditions of recall needing to overlap with conditions of learning for successful retrieval
Voice capture
the practice of using spoken language as a primary cognitive capture method, particularly in high-friction moments when text input is impossible or impractical, to preserve insights that would otherwise be lost due to the temporal and physical constraints of human cognition
Photograph as capture
the practice of using visual documentation as a primary cognitive capture method for spatial, visual, or environmental information that cannot be adequately represented through sequential text, leveraging the brain's dual coding pathways to preserve information with superior retention compared to verbal description alone
Capture trigger
a behavioral anchor that automatically initiates a capture action by linking a pre-existing habit to a specific capture behavior through a 'after I [existing habit], I will [capture behavior]' formula
Automaticity
the state where a behavior becomes reliably performed without conscious effort or willpower, typically achieved through repeated pairing of a cue with a response over 18-254 days
Hot capture
the cognitive process of rapidly recording fleeting thoughts, ideas, or observations without immediate organization or refinement, occurring in a temporary, frictionless storage system designed for speed of entry rather than quality of output
Capture resistance
the psychological mechanism where individuals consciously or unconsciously avoid externalizing certain thoughts due to the emotional discomfort, cognitive dissonance, or experiential avoidance that concrete expression would trigger, serving as a diagnostic signal about what matters most to the individual
Conversational memory
the cognitive process by which information exchanged during social interactions is encoded, stored, and retrieved, characterized by systematic forgetting patterns, gist-based recall, and source monitoring failures that make it particularly unreliable for decision-making
Third brain
the externalized cognitive infrastructure that extends human mental capabilities through tools, systems, and artifacts that enable information processing, storage, retrieval, and integration beyond the biological limitations of individual cognition
Emotion
a somatic marker that represents a brain's prediction about what bodily sensations mean in the current context, based on prior experience and learned categories, serving as essential data for decision-making rather than noise interfering with rational thought
Surprise
the neurochemical signal generated by prediction error when reality differs from expectation, serving as the primary learning trigger in biological systems and indicating a gap between one's internal model and external reality
Decision journal
a structured record of decisions that captures not just what was decided but why, including the reasoning, expected outcomes, and review dates, designed to preserve the actual decision-making process before hindsight bias can contaminate memory