/** Returns true if Solution can be valid. */
public boolean isValidSolution() {
for (EntityTriple e : solution) {
if (!e.isValidTriple()) {
return false;
}
}
for (int i = 0; i < solution.size(); i += 1) {
for (int j = (i + 1); j < solution.size(); j += 1) {
if (solution.get(i).hasSameEntities(solution.get(j))) {
return false;
}
}
}
return true;
}
