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SCP Safety Guarantee Question

I have a question regarding the Stellar Consensus Protocol. In the SCP whitepaper it is stated on page 14 under the point 5.4 "Accepting is not enough": "But as discussed in Section 4.1, the only ...
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pBFT in closed 100 node setup

Can Practical Byzantine Fault Tolerance (pBFT) be considered as one of the quorum configurations of SCP of stellar? I am considering the situation where the 100 nodes are run in a closed network.
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What is the difference between FAILURE_SAFETY and QUORUM_THRESHOLD?

My assumption is that FAILURE_SAFETY refers to how many nodes in your quorum slice you allow to fail while QUORUM_THRESHOLD refers to the percentage of nodes in an quorum that's necessary to come to a ...
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When to accept different value than voted

In the whitepaper it is stated that a node v accepts a statement a iff either: (1) There exists a quorum U such that v is in U and each member of U either voted for a or claims to accept a. or (2) ...
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Algorithm to find quorum

Given a set of nodes with information about how the note voted/accepted and their quorum slices and my quorum slices. How can I efficiently determine a quorum? Is there any special algorithm used? ...
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Perpetual preemption attack

From SCP's white paper, it states Our definition of liveness is weak in that it says a node can externalize new values, not that it will. Hence, it admits a state of perpetual preemption in which ...