Homework on Consensus - Questions

Blockchain and Bitcoin 101
#442

  1. consensus means all the nodes agree over what is true or what is false. everybody needs to verify if something is true so we can all confirm it’s true, reach concencus, and so it is the proven truth.

  2. in a central database the is no way to know what the truth is because bad actors can always edit the data as they like.

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#443

  1. All the nodes in the network come to an agreement (which is consensus) and they are incentivized to agree upon that which is true.

  2. A central database does not have a network of nodes coming into agreement with each other. Therefore, a central database is controlled by a single entity.

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#444

Blockchain consensus determines the truth because the ledger of computers have to all agree a transaction is valid and all have an incentive to report a false transaction.
This is different from a central database because with a central database you cannot see anything and have to just trust that the company is doing what it is claiming

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#445

  1. Consensus is reached when all participants agree. This creates a trustless environment.

  2. Truth in a central database is determined by the owner of that database.

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#446

  1. Consensus means “agreement”. All computers on the network must agree to an input before it can be recorded on the blockchain. The fact that there is no single entity/person/company involved means that the element of trust is removed and that the information, once on the blockchain, is considered the truth. Once consensus is obtained, it then only becomes a matter of verification [of the truth].

  2. “Truth” on a central database is highly suspect since the information recorded depends on the objectivity / honesty / ethic / morals / belief / interpretation of the entity recording the information. It is subjective and should never be assumed to be the truth nor accurate. The human element can corrupt data.

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#447

1.More people firm consensus,and all then agreed with same data. So thats must be a true :smiley:

2.In central data base noone guarantees for data.and because they are not reliable,unlike in blockchain.

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#448

  1. It means that in a fully incentivized and deterrent system where every actor can gain from respecting the rules, bad actors will be darkened out to reach, or to allow new consensus.

  2. Because it is Trustless, Distributed and Transparent : meaning that all informations can effectively verify anyone.

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#449

  1. In reference to blockchain, by saying that ‘consensus determines the truth’ we are stating that every participant (node) involved in the process of coming to an agreement (consensus) confirms the transaction (trust-less verification) on the public database (blockchain digital ledger). This is due to the fact that the blockchain is decentralization and participants are rewarded for providing the verification (truth) through incentives.

  2. In a central database this is much different due to the database being centrally controlled and operated. We are required to ‘trust’ the centralized database through good faith and not a provable verification process. This allows for tampering, dishonesty, and duplication. As opposed to a de-centrally reached consensus by which numerous, mutual, incentivized participants can verify.

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#450

Trustless technology is using mathematics (which is an exact science) that can not be trustworthy. It shows the exact truth. Absolutely truth. Mathematical truth : the real ****. It is not “several parties”, it is all parties ! or there wouldn’t be any absolute consensus. I guess what you meant by “general agreement” was in fact “perfect consensus” 'cause there couldn’t be any other threat, other than losing money, when all other parties would only be loosing time… or planning for a Fork :smirk:.
I dare say, I’m kicking, with your response, right in the nuts :peanuts: :nut_and_bolt: of what is the difference between perfect consensus [spoiler]like F or G are to C major scale(I is C), extraordinary perfect, almost “Godly” consensus[/spoiler] and general agreement :nauseated_face: [spoiler]commonly agreed II♭ (D♭)[/spoiler].

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#451

Homework on Consensus - Questions

  1. What does it mean when we say that in blockchain, consensus determine the truth?

Its have to be Concensus from all user on the blockchain befor it will be determine the truth.

  1. How is this different from how truth is determined in a central database?

In normal, not blockchain central database anny person that have the power can determine the truth.
That means that one person can determine the truth and thats not safe way.

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#452

1 Consensus is when several parties decide on something,determines the truth ,all nodes must agree .
2.Not transparent,they can not be trusted.enyone who got access in centralised data can change it.

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#453

  1. consensus determines the truth because with the block incentive individual miners will compile the true blockchain. they lose out on the reward if they are not included in the concensus.

  2. truth in a central database can be amended, wholly illegitimizeing “truth”

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#454

  1. when you can verify the entire network that end up being a consencus

  2. because in a central database is not incentivised by verifying the entire network

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#455
  1. Everyone is rewarded financially to verify information
  2. A central database can be altered.
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#456

Consensus determines the truth because all parties agree and have an economic incentive
In a central database there is no incentive for the truth to be determined

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#457

1.What does it mean when we say that in blockchain, consensus determine the truth?

  • Blockchain minimize the amount of trust required from any singel actor in the system

2.How is this different from how truth is determined in a central database?

  • Trustless and decentrelized
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#458
  1. consensus is when multiple verifiers agree the transaction is real. verifiers are incentivized to tell truth.
  2. the centralized database can be manipulated to serve blockchain owner.
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#459

It can be verified the across the global network of cryptographically secured ledgers that are distributed.
A centralized ledger can be devised to reflect what the authors of the ledger want not what is actually accurate. (idea from On Nuclear Energy, from Imagined Worlds 1998; Freeman Dyson, He soul flies free today, and may his body RIP)

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#460

Homework on Consensus - Questions

  1. What does it mean when we say that in blockchain, consensus determine the truth?
  2. How is this different from how truth is determined in a central database?

1 - Means that each transaction or declaration on the ledger, if it’s not found in other ledger database of the blockchain network, stored in other nodes, consent (confirmation) will be not verified and inserted in the blockchain, therefore not confirmed.
This means that there is no way of cheating in the society using such a blessing new present and future technology. Thank you Satoshi :slight_smile:

2 - In traditional central database, there is no certainty of honesty and secureness of the true declaration. Can be easily manipulated multiple times from the owner without no proof of reality.

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#461

  1. What does it mean when we say that in blockchain, consensus determines the truth?
    Consensus means that all participants play by the rules and incentives motivate to do it so.

  2. How is this different from how truth is determined in a central databases? there are not incentives and trust is needed.

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