On the Subject of Telepathy

You already knew what this flavor text was.

You and the computer within the module are facing off, head-to-head in a game of Telepathy. You’re a couple questions in now, and you think you have enough information to win. In order to solve the module, deactivate the computer by delivering the fatal blow to its ego through guessing its selected square.

Displayed on the module are four sets of coordinates which can be used to locate a square in the grid on the next page. You know that:

• Exactly one of the coordinates is in the same row as the computer’s square.
• Exactly one of the coordinates is in the same column as the computer’s square.
• Exactly one of the coordinates is the same color as the computer’s square.
• Exactly one of the coordinates has the same symbol as the computer’s square.
• Every coordinate on the module shares exactly one characteristic (row, column, color, symbol) with the computer’s square.
• None of the coordinates share any characteristics with each other.

After using this information to determine which square belongs to the computer, set the display to match the computer’s square. If the first digit of the serial number is even, submit your answer using the coordinate with the same color as the computer’s square. Otherwise, use the coordinate with the same shape as the computer’s square.

However, if there is an unlit SIG indicator, no RJ-45 port, and no batteries on the bomb, the computer hasn’t actually been turned on. In which case, the computer’s square will default to A1 and all of the above bullet points become invalidated. Set the display to match A1 and submit the coordinate which has the same color and symbol as A1.