But since no one publishes negative results, Lehrer says, those important decisions are sometimes based on biased information.
Some parents are taking extra precautions, sometimes based on grim calculations.
Sometimes, based on his assessment of their statistical inaccuracies, he spoofed fellow journalists.
It is sometimes based on sources you wouldn't take to Sunday school".
"Physical challenges are sometimes based on this notion that if we all experience humiliation together, we'll feel bonded," he said.
Further complicating things for opposing quarterbacks, the three players rotate around the field to play from different orientations, sometimes based on calls by Fewell, sometimes based on their own decisions before the snap.
While property taxes are sometimes based on reported sales values, these can be manipulated to reduce taxes.
And sometimes, based on the mandatory kindergarten screening that takes place in April, parents are strongly encouraged to enroll a child who needs to develop skills.
"The Gate of Harmonious Interest" (2000) continues Ms. Fradkin's commentary on self-image, and how that image is sometimes based on the unrealistic model of a Barbie doll.
The Sufi orders, sometimes based on trades or guilds, were the main way religion was organised, and they encouraged self-discipline, spirituality and mysticism in varying degrees.
Before prescribing pharmaceuticals, doctors must consider the benefits and risks for each patient, sometimes based on subtle factors in that individual's physiology or health profile.
