Problem: Does "This means that in case of a conflict with domestic law, international law will always prevail." answer the question "The preamble of what states that treaties are a source of international law?"

A: no

Problem: Does "As early as 2002 it was apparent that credit was fueling housing instead of business investment as some economists went so far as to advocate that the Fed "needs to create a housing bubble to replace the Nasdaq bubble"." answer the question "In the early 2000s, what type bubble did some economists believe the Fed needed to create to replace the Nasdaq bubble?"

A: yes

Problem: Does "Some countries have tried to encourage scientific research." answer the question "How much did the Higher Education Commission impact the number of PhDs in Pakistan?"

A:
no