In most of them. It's not difficult: You simply dictate requirements that can be only solved by one engineering solution. But that, in essence, is part of the

In most of them. It's not difficult: You simply dictate requirements that can be only solved by one engineering solution. But that, in essence, is part of the challenge with blockchain. People treat it as a self-describing requirement. ("This must be on the blockchain") rather than a technical solution for a dubious set of problems most people don't have.