…e entering the data trustworthy, they merely enable you to audit whether it has been tampered with. A person who sprayed pesticides on a mango can still enter onto a blockchain system that the mangoes were organic. A corrupt government can create a blockchain system to count the votes and just allocate an extra million addresses to their cronies. An investment fund whose charter is written in software can still misallocate funds.
No they can’t, but they can create a multisignature contract that will prevent the farmer from adding their transaction until two or three labs have validated the claim. Something that rarely happens nowadays. Yes, I do agree in full with the fact that this is just technology and humans being humans will try to hack the system no matter what. But it’s important to state that blockchain technology IS useful in certain cases.