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# 6 Examples of the Arrow Of Time

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The arrow of time is the theory that time moves in a single direction from past to future. This has several interesting implications:

## Time is Irreversible

The arrow of time means that time is irreversible such that time travel is not possible and the future can not influence the past.

## Causality

The arrow of time is often used to establish cause and effect as it is impossible for a future event to be a cause of a historical event. This isn't always clear cut. For example, the old dilemma - what came first the chicken or the egg?

## Entropy

Entropy is the amount of disorder in a system. According to the Second Law of Thermodynamics, entropy moves in a one-way direction with the arrow of time. In other words, disorder or randomness increases with time. This can explain the observation that all things, including the universe itself, age and become less orderly over time. Technically, this only applies to an isolated system. An outside force could use its energy to restore order to something. For example, an old building can be continually repaired and maintained such that it improves with time.

## Entropy is Irreversible

The entropy of an isolated system is irreversible. For example, a rocket launches and burns fuel such that particles of exhaust scatter in a large number of directions. This process can not be reversed by the rocket. The principle that entropy is irreversible is validated by everyday observations such as the experience that aging is irreversible despite extreme human efforts to "cure" aging.

## Consciousness

The arrow of time is perceived intuitively by the human mind such that people accept it as self-evident. For example, if you play a video backwards, people will immediately recognize that the events in the video are going the wrong way. As a theory of physics, the arrow of time remains unproven.

## Complexity is Irreversible

As the universe moves from an ordered state to a random state, according to the laws of thermodynamics it becomes more complex. For example, the information required to record the state of the Universe at the moment of the Big Bang is much less than the information required to record its state now. This is useful as a rule of thumb that is applicable to life in general. For example, a society that becomes more complex by adopting new technologies is unlikely to reverse back to a simpler state.

### Notes

The other dimensions of the Universe, namely the three dimensions of space, do not have a one-way direction like time.
 Overview: Arrow Of Time Type Definition The theory that time moves in a single direction from past to future. Attributed To Arthur Eddington Related Concepts

## Thinking

This is the complete list of articles we have written about thinking.
Abductive Reasoning
Abstract Thinking
Abstraction
Aesthetics
Analogy
Analysis Paralysis
Analytical Thinking
Anomie
Argument
Argument From Silence
Arrow Of Time
Assertions
Automaticity
Backward Induction
Base Rate Fallacy
Benefit Of Doubt
Big Picture
Brainstorming
Call To Action
Catch 22
Causality
Choice Architecture
Circular Reasoning
Cognition
Cognitive Abilities
Cognitive Biases
Cold Logic
Collective Intelligence
Complexity Bias
Concept
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Constructive Criticism
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Counterfactual Thinking
Creative Tension
Creeping Normality
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Culture
Curse Of Knowledge
Decision Fatigue
Decision Framing
Decision Making
Defensive Pessimism
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Divergent Thinking
Educated Guess
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Epic Meaning
Essential Complexity
Excluded Middle
Failure Of Imagination
Fallacies
Fallacy Fallacy
False Analogy
False Balance
False Dichotomy
False Equivalence
First Principles
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Four Causes
Fuzzy Logic
Gambler's Fallacy
Generalization
Golden Hammer
Good Judgement
Grey Area
Groupthink
Heuristics
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Hope
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Misuse of Statistics
Motivated Reasoning
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Nirvana Fallacy
Norms
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Sour Grapes
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Subjectivity
Systems Thinking
Thinking
Thought Experiment
Unknown Unknowns
Visual Thinking
Want To Believe
Win-Win Thinking
Wishful Thinking
Worldview

## Logic

A few logic terms explained.

## Law Of Excluded Middle

A classical law of logic first established by Aristotle.

## Fuzzy Logic

Logic that allows for partial truths.

## Logic vs Intelligence

The difference between logic and intelligence.

## Causality

The definition of causality with examples.

## Magical Thinking

The definition of magical thinking with examples.

## Scientism

The definition of scientism with examples.

## Fallacies

A list of logical fallacies.

## Mutually Exclusive

The definition of mutually exclusive with examples.

## False Balance

The definition of false balance with examples.

## Problem Solving

An overview of problem solving with examples.

## Thought Processes

A list of thinking approaches and types.

## Workaround

A definition of workaround with examples.

## Creative Thinking

A list of common creative thinking techniques.

## Problems

A list of common types of problems.

## Analysis Paralysis

The definition of analysis paralysis with examples.

An overview of common business problems.

## Decision Framing

The definition of decision framing with examples.

## Research

The common types of research.
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## New Articles

Recent posts or updates on Simplicable.
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