Q: In optics, a virtual image is an image formed when the outgoing rays from a point on an object always diverge. The image appears to be located at the point of apparent divergence. Because the rays never really converge, a virtual image cannot be projected onto a screen. In diagrams of optical systems, virtual rays are conventionally represented by dotted lines. Virtual images are located by tracing the real rays that emerge from an optical device (lens, mirror, or some combination) backward to a perceived point of origin.
Can we conclude that can you see a virtual image on a screen?
A: no

Q: Coronary artery disease (CAD), also known as ischemic heart disease (IHD), refers to a group of diseases which includes stable angina, unstable angina, myocardial infarction, and sudden cardiac death. It is within the group of cardiovascular diseases of which it is the most common type. A common symptom is chest pain or discomfort which may travel into the shoulder, arm, back, neck, or jaw. Occasionally it may feel like heartburn. Usually symptoms occur with exercise or emotional stress, last less than a few minutes, and improve with rest. Shortness of breath may also occur and sometimes no symptoms are present. In many cases, the first sign is a heart attack. Other complications include heart failure or an abnormal heartbeat.
Can we conclude that is coronary artery disease and ischemic heart disease the same thing?
A: yes

Q: Smaller roles (some only a few seconds) were played by Michael Ansara, Ina Balin, Carroll Baker, Robert Blake, Pat Boone, Victor Buono, John Considine, Richard Conte, John Crawford, Jamie Farr, David Hedison, Van Heflin, Russell Johnson, Angela Lansbury, Mark Lenard, Robert Loggia, John Lupton, Janet Margolin, Sal Mineo, Nehemiah Persoff, Sidney Poitier, Gary Raymond, Marian Seldes, David Sheiner, Abraham Sofaer, Paul Stewart, John Wayne, Shelley Winters, and Peter Mann.
Can we conclude that did sidney poitier play in the greatest story ever told?
A: yes

Q: A standard home blow dryer will kill 96.7% of eggs with proper technique. To be effective, the blow dryer must be used repeatedly (every 1 to 7 days since eggs hatch in 7 to 10 days) until the natural life cycle of the lice is over (about 4 weeks).
Can we conclude that can you get rid of lice with a hair dryer?
A:
yes