Little by little... Let's go slightly further:Can we know whether d(s,t)=2? Not hard either:Just see whether t is a neighbor of some neighbor of s. Note that some neighbors of neighbors of s may have been seen before either as s itself or as a neighbor of s. 12Little by little… ◼ Let’s go slightly further: Can we know whether 𝑑(𝑠,𝑡) = 2? ◼ Not hard either: Just see whether 𝑡 is a neighbor of some neighbor of 𝑠. ◼ Note that some neighbors of neighbors of 𝑠 may have been seen before either as 𝑠 itself or as a neighbor of 𝑠. s t 12