Troika

 troi·ka

/ˈtroikə/

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noun

1. 1.

   a Russian vehicle pulled by a team of three horses abreast.
2. 2.

   a group of three people working together, especially in an administrative or managerial capacity.

Conjecture

 con·jec·ture

/kənˈjekCHər/

noun

plural noun: conjectures

an opinion or conclusion formed on the basis of incomplete information.

"conjectures about the newcomer were many and varied".

A statement that might be true (based on some research or reasoning), but is not proven. So a conjecture is like an educated guess.  

Example: I heard the sound of a plastic bag, so I conjecture there might be some food!

Pitch Perfect

 pitch-per·fect

/ˈpiCHˌpərfəkt/

adjective

1. exactly right in tone, mood, or pitch.

   "a pitch-perfect, hilarious sendup of a AB–style documentary"..