On the surface it sounds BS. How many nodes are in the group doing the consensus?
This looks like a blockchain ledger project. I didn’t read far enough to see if their ledger is a blockchain.
The consensus is across the whole network of nodes which all seem to keep a record of transactions. But then there are subnets too.
I cannot from the reading see how a coordinated group of dishonest actors cannot take over their network if there are enough dishonest (51%) since they are using time stamps as a source of validation against bad actors. Once the coordinated attack has 51% then they can all lie and claim the honest nodes are the liars.
But if it is not coordinated then the timestamps and carrying information from the past can detect incorrect claims of individual nodes. Thus for an uncoordinated attack you could in effect have just one valid node and any inquiries can in theory detect invalid responses due to the crypto history. But a coordinated attack could rewrite history, or just insert their own version of it and claim the others are liars.