Unit 16 · Positional Constraint Deduction
Train Table — Which Statement Must Be True?
Lesson 5 of 6
About this lesson
Train table seating combines two types of constraint at once: which direction a person is facing (forward or backward) AND which type of seat they have (window or aisle). This question adds a third spatial relationship — "diagonally opposite" — that students sometimes confuse with "directly opposite." Getting those three terms right is the whole game.
Chapters
Question
Jess, Kamilla, Lucy, and Max are seated around a table on a train. Two of them are facing forwards (in the direction of travel) and two are facing backwards. Two have window seats and the other two have aisle seats.
I know that: Jess is sitting diagonally opposite Lucy; Max is facing forwards; Kamilla is next to Jess.
Which one of the following do I also know?
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