Coherent thoughts are thoughts that build on and support one another.
Coherency allows us to assemble knowledge from piece of information. We see an apple, we hold the apple in our hand assessing density and firmness. We take a bite assessing moistness, crispness, sweetness...
... is it ripe, or non-ripe... we now have enough data to assemble that conclusion.
Coherency is what allows information to persist whether there are any beings around to be aware of it.
We can peer at the planet Jupiter in various wavelengths and we can see it has more detail to its patterns of atmospheric phenomena.

Information can become knowledge when a being becomes aware of it.
Information is fundamental. Knowledge is a natural, emergent, hosted phenomenon. A "mind" and its attached body are born into existence... they have some information built in genetically. And they have a "mind" in their brain. It has senses. The sense collect data/information.
Knowledge gets synthesized from within the incoming data/information. Putting information together like pieces of a jigsaw puzzle.
Why did that ability evolve? Because the flower that bends to the sun got more light, the hand that picks the better apple obtains more nutrition and lives longer than the body attached to the hand that doesn't know a rotten apple when it sees and holds one.
Judiciousness, critical assembly of data into knowledge... directly impacts our ability to fulfill our absolutely not-ignorable physiological needs. Without food you die. The ability to "know" what food is, makes the difference between being possible to stay alive, and not.
Information is fundamental.
Thinking, thought, knowledge, speculation, these are naturally emergent. Attached to the need to eat, drink, keep one's body secure and safe.
The Earth was always a sphere. Even when common "knowledge" mistakenly thought it was a flat saucer, centuries ago.
The information existed before anyone came to know it.
Take the Earth's climate cells, the Hadley, Ferrel and Polar cells. They are patterns of persistent flows of air and pressure and temperature within Earth's atmosphere.
The patterns in the atmosphere are information/data... properties and characteristics that have existed for millions and millions of years.
Then along came Hadley, and noticed one of the "bands". That is why we call them the Hadley Cells. One North, one South. He saw data, and synthesized it. Noticed patterns. Double-checked and confirmed and triple-checked.
Knowledge emerged into existence. We know this happened. We know the "Who", the "Where" the "When" and the "What data drove his recognition of the knowledge to be derived".

Then... With that recognition made, and more data available, enter Ferrel. Ferrel sees... A second pair of bands, similar to the Hadley cells, but further North and further South.
And we know that took place, because we named the cells after their "recognizer". The first human to put a whole bunch of 2+2's together, till he saw a swirling band of pressure and flow-balanced updrafts and downdrafts and jetstreams.
Key aspects of coherent thought include:
Logical Consistency: Coherent thought involves organizing ideas or
propositions in a manner that is logically consistent. This means that
each idea or proposition aligns with other ideas in a way that does
not lead to contradictions or logical errors.
Clarity of Expression: Coherent thought entails expressing ideas
clearly and concisely, using language that is precise and
understandable to others. This involves avoiding ambiguity, vagueness,
or confusion in communication.
Logical Connections: Coherent thought involves establishing logical
connections between ideas, concepts, or propositions. This includes
identifying relationships such as cause and effect, similarity and
difference, and logical inference.
Contextual Relevance: Coherent thought considers the context in which
ideas are presented, taking into account relevant background
information, assumptions, and implications. This helps ensure that
ideas are meaningful and applicable within their given context.
Purposeful Organization: Coherent thought involves organizing ideas or
propositions in a purposeful and systematic manner. This may involve
structuring information chronologically, categorically, or
thematically to enhance understanding and facilitate communication.
Overall, coherent thought reflects a cognitive process in which ideas are logically connected, expressed clearly, and organized purposefully to facilitate understanding and communication. It is a fundamental aspect of human cognition and plays a crucial role in various intellectual endeavors, including reasoning, problem-solving, and creative expression.
An evolved skill, like running and jumping and picking apples from trees.
Emergent and existent in multiple species of life. (the ones with brains)... other creatures who don't think can still have reaction systems that aid in their survival.
Physiological necessity. A creature that needs to eat, but has no ability to calculate where and how to get food, better either live in an apple, or have them fall from the sky nearby where they might get run into by chance, often enough.