This Quora answer describes the Byzantine General's problem well:
Obviously if you change the problem so that generals can trust certain other generals or messengers or outside "unique nodes", you can "solve" it. This is how banks and ripple solve it. Bitcoin's breakthrough was solving the problem with no trust by using a proof-of-work system. If a coin does not use POW, that means that there is centralization/trust involved. Emulah doesn't seem to understand this concept very well.
You did not even comment on the mechanism that Emulah claims to use above (ie. proof-of-work-of-verification). ie. Emulah attempts to rely on proof-of-work. The proof is just different from hashcash. ie. Emulah is using something different from hashcash to prove that work was done. Bitcoin and all other alts rely on the hashcash concept.