It is questionable if all the mechanical inventions yet made have lightened the day's toil of any human being.

Unfortunately Climate Science has become Political Science. It is tragic that some perhaps well-meaning but politically motivated scientists who should know better have whipped up a global frenzy about a phenomena which is statistically questionable at best.

While that amendment failed human cloning continues to advance and the breakthrough in this unethical and morally questionable science is around the corner.

I know of no more encouraging fact than the unquestionable ability of man to elevate his life by conscious endeavor.

One of the consequences of the Iranian revolution has been an explosion of history. A country once known only from British consular reports and intrepid travelogues is now awash with historical documents letters diaries grainy video weblogs and secret police files of questionable authenticity.

Without economic development any potential for political openness and freedom will be questionable.

You can hype a questionable product for a little while but you'll never build an enduring business.