Who is Satoshi Nakamoto, the creator of Bitcoin?

Satoshi Nakamoto is the name used by the presumed pseudonymous person or persons who developed bitcoin, authored the bitcoin white paper, and created and deployed bitcoin's original reference implementation.

Hal Finney
Harold Thomas Finney II (May 4, 1956 – August 28, 2014) was a developer for PGP Corporation, and was the second developer hired after Phil Zimmermann.

Arguments for

 * Hal Finney lived near a man named Dorian Satoshi Nakamoto, he could have been inspired by him for his pseudonym.

Arguments against

 * Hal Finney's first contributions were corrections to the Bitcoin code, including cryptographic errors.
 * This argument does not prove or disprove Finney´s relation with Nakamoto.

Nick Szabo
Nicholas "Nick" Szabo is a computer scientist, legal scholar, and cryptographer known for his research in digital contracts and digital currency.

Arguments for

 * Szabo's writing style is the closest to that of Satoshi Nakamoto.

Arguments against

 * Nick Szabo denied to be Satoshi Nakamoto.
 * Nick Szabo designed Bit gold under his real name.
 * This argument does not prove or disprove anything. Maybe he would have wanted to be anonymous on a new creation, bitcoin.
 * But it makes it less likely that Szabo will change his anonymity behaviour.

Craig Wright
Craig Steven Wright (born October 1970) is an Australian computer scientist and businessman. He has publicly claimed to be the main part of the team that created bitcoin, and the identity behind the pseudonym Satoshi Nakamoto.

Arguments for

 * He is skilled with Bitcoin Script.

Arguments against

 * Craig Wright claimed to be Satoshi Nakamoto without providing public cryptographic proof.
 * Craig Wright makes technical mistakes on subjects he should have mastered to create Bitcoin.

Adam Back
Adam Back (born July 1970) is a British cryptographer and cypherpunk. He is the CEO of Blockstream, which he co-founded in 2014. He invented Hashcash, which is used in the Bitcoin mining process.

Arguments for

 * Satoshi Nakamoto wrote in British English and referred to the British newspaper Times in the genesis block.
 * This could easily be a strategy to confuse the issue of his/her identity.
 * Both Satoshi Nakamoto and Adam Back consistently used two spaces after each sentence in the Bitcoin Forum.
 * The use of two spaces was common in the Anglo-Saxon world until at least the 2000s.

Arguments against

 * All of Adam Back's cryptocurrency-related projects (both before and after Bitcoin, including Hashcash and Blockstream) have been conducted publicly under his real name.
 * Adam Back denied to be Satoshi Nakamoto.
 * Denying to be someone does not make it any less plausible that he is Satoshi Nakamoto.