Any of the following computers could have transmitted the virus to two other computers on the network EXCEPT:

sprozes on December 14, 2019

Please Explain

Could you please explain this question?

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Skylar on December 15, 2019

@sprozes, happy to help! This is a difficult game.

First, let's look at what we can deduce from the setup of the game.
- We know that S must transmit to exactly one other computer. It cannot transmit the virus to itself, it can't transmit it to R since it receives the virus from the same computer that R does, it can't transmit it to Q because of Rule 4, and it can't transmit it to P because of Rule 4. This means that S can only transmit the virus to either T or U, as these are the only remaining options.
- T and U are also the only options that can start the chain, as R, S, Q, and P all have rules that specify how they receive the virus from other computers. Since they're receiving the virus from other computers in the network, they cannot be the ones to start it.

With this in mind, let's look at answer choices A , B, D, and E. For each, we'll try to come up with a possible chain. If a valid scenario exists, the answer choice can be eliminated becase this is a Bizarro question.
(A) U - P - R - Q
- S - T
(B) T - Q - R
- S - U - P
(D) T - R - Q
- S - U - P
(E) U - R - Q
- S - T - P
Since these are all valid scenarios that show the identified possible transmission to two computers, we can eliminate these answers.

We are left with (C). Let's try to create a scenario.
- Q
U - R - P
- S - T
This scenario is invalid, as R cannot be connected to P because Rule 4 states that either T or U must transmit to P. Since there are no other options for R to transmit to, it is impossible for R to transmit to two computers and (C) is the correct answer.

Does that make sense? Please let us know if you have additional questions!