Scientists had observed that mice with a defective Klotho gene aged prematurely and wondered if an enhanced gene would have an opposite effect.
Can we say the following?
Scientists have discovered a gene that produces a hormone that raises the life expectancy in mice by 30 percent.

no

A variety of devices could be powered selectively from a single-power source carried on the body via multiple power supply signals at different frequencies, according to the patent abstract.
Can we say the following?
The patent abstract shows a number of devices using a single source.

yes

Clinical trials involve 240 patients in 10 centres with each patient questioned three times.
Can we say the following?
Clinical trials involve an average of 200 patients per trial.

no

So far Sony BMG has not released a list of how many of its CDs are protected or how many have been sold.
Can we say the following?
Sony BMG sells protected CDs.
yes