Meanwhile, further observational studies were amassing evidence about whether varenicline use is associated with adverse events.
"When there's doubtful evidence about whether someone's guilty, they certainly shouldn't be executed," he says.
There was conflicting evidence about whether his pulse was weak or non-existent.
In an interview, Dr. Bowman said she had been waiting for conclusive evidence about whether the therapy was tainted.
Dr. Gross said that investigators were still trying to assess contradictory evidence about whether damaged and missing fireproofing was fixed.
"When you look at the evidence about whether it actually decreases smoking, that's not so clear," Dr. Amos said.
Anderson has spent more than a year in jail for refusing to testify before a federal grand jury that was hearing evidence about whether Bonds committed perjury.
But the review raised a substantive point that stands: there is far too little reliable prospective evidence about whether this frontline approach to flu works.
But the truth is that we have had no reliable evidence about whether we're as good as we think we are.
The tests could have been done, he said, to find crucial evidence about whether the judge was dead or alive when the fire started.
When pressed for evidence about whether President Bush had lied, Mr. McDermott said, "I think the president would mislead the American people".
