Author: Unknown
Subject: two values that point to the same position
Date: Monday, 13 Apr 2020, 21:19:03

Is there a possibility that two triples have the same exact position, but different REACHEDFROM and NSTEPS. 

In this case, the hash function return the same key, and the two triples are stored in the same chained array. 

then the search function would have triple deciding which triple to return. 

I guess this wouldn't happen. but why this wouldn't happen?