Blocky saysA blockchain solves the trust problem — letting strangers agree on a shared record with no central authority.
Normally we trust a bank or platform to keep the authoritative ledger. A blockchain replaces that trusted middleman with cryptography and consensus: a shared, append-only record that many independent parties verify and agree on. No one entity can quietly rewrite history. That's the core innovation — trust through math and incentives, not authority.
Power-ups you unlock
Removes the need for a trusted middleman
Shared, append-only, independently verified
Cryptography + consensus replace authority
Hard to rewrite history
Double-Spend Dan attacks — common mistakes
Thinking blockchain = cryptocurrency only
Assuming it’s trustless (it’s trust-minimized)
Using a blockchain where a database is simpler
Boss battleName a situation where removing the middleman genuinely helps — and one where it doesn’t.
Example code
<!doctype html><html><head><meta charset="utf-8"></head>
<body style="background:#06040d;color:#e6e0ff;font-family:monospace;padding:20px"><pre>bank ledger: trust the bank
blockchain: trust math + many verifiers
→ no single party rewrites the record</pre></body></html>