Knowledge = True Belief.
Knowledge is a subcategory of belief. You have to start by believing something (first presuppositions; first proposition, the building block everything else is connected, or the chain of facts that the starting belief rests upon). Since you don't know how everything is connected in all its details you must start from a belief and work from that core supposition. Can you justify your belief? If so, then it is knowledge.
As I mentioned in the other post: you have it backwards.
Belief is a subcategory of knowledge.
If you don't know something you can't justify it as a true belief.
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You have grown up isolated with no modern conveniences, are a vegetarian and eat everything uncooked, and have never touched steaming hot water before from a kitchen tap. You have seen mist and steam rising from a stream due to condensation (signifying the difference in temperature to those who know) but it means nothing to you. The mist has not burned you when you touched the water.
You are introduced to a modern kitchen and see the running water. Can you know the water from the tap is hot before you experience the sensation? Do you know that the mist and steam from the steam signifies a heat exchange? Once you experience the burn you have a belief that water from a kitchen tap is hot (you do not continue to believe nothing about the hot water or tap at all), a belief that corresponds to what is, thus you know one thing although not necessarily the complete knowledge of the water from the tap.
Now, what happens if you do not realize the difference between the hot water tap and a cold water tap? The water is again coming through the tap. Is your belief that you will get burned next time you put your hands under the tap necessarily justified? No, because you have no knowledge of the difference between the hot and cold taps, even though the water comes through the same faucet. If you see the steam/mist rising from the steam but it has never burned you, why would you believe the steam coming from the tap is going to burn you now? Again you have to rightly connect the parts to have a justifiable knowledge of the water tap.
You first have to connect water, stream, steam, in conjunction with hot water, tap, steam, plus the consequences of what you experienced to your belief system before you have knowledge that the steaming water from the tap will burn you. You have to believe there is a tap there before you use it. You have to believe that the tap will dispense water when turned on and hot water if you turn the hot water valve. You have to believe that hot water is also signified by steam coming from the faucet, which will burn you if you place your body parts under it. You have to believe there is a difference between the water from the stream and the water from the hot water tap. If you don't know what the tap does, you will be ignorant of its purpose. Thus, when you see it you must believe it has a purpose and that purpose must first be confirmed to your belief system before you know its purpose and can use it correctly.
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You first have to believe something before you can know it. You start with a basic presupposition. (I.e., that water coming from the tap is hot and will burn me). If that presupposition pans out to what is the case, you have knowledge.
If you don't believe it is the case how can you know it?
Conversely, you can believe you know something but don't for the reason that it does not correspond to what is the case or you have not connected enough of the gray matter with the real.
Knowledge-in-and-of-itself <-* knowing any/all *not* to believe (to a certainty)
Belief-in-and-of-itself <-* trying belief for belief-based ignorance(s)
Ignorance-in-and-of-itself <-* no conscious knowledge of ignorance
True Belief = Knowledge of any/all degrees of uncertainty pertaining to that belief. It is conscious knowledge of ignorance. The conscious justification never pertains to how the "belief" could be "true", but rather "false". That is conscious knowledge of ignorance.
Knowledge is true JUSTIFIED belief. It is what is the case and has been confirmed to your belief system. The knowledge comes once you presuppose/believe something that is confirmed to be the case.
You have to start somewhere. That start is your belief system. It is the core of your belief system, the things you first presuppose to believe other things.
If a personal "believes" something to be "certain" they are ignorant-in-and-of-themselves.
Do you believe truth is necessary to know something?
Is truth something that is the case? If so, then there is a certainty of knowing it, once you understand what it is.
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If a person "believes" something to be certain they are not ignorant if the belief is justifiably true. If it is justifiably true it is truly known.
Do you know the laws of logic (the laws of contradiction, identity, and excluded middle) are necessary to believe before you can make sense of any communication? The laws of logic would be self-evident since to deny these laws (and make sense) is to use them.
By saying, "I deny the laws of logic," you have used them in the denial. What you claim goes against what you actually say, so you refute your own statement.