Self-study
News report: Some recently invented television screens are built out of small tiles seamlessly joined together, each tile a separate miniature screen. ██████████ ████ ████ █████ ████████ ███████ ███ ████ █ ███ ██████ ██████ ███ █ ███████████ ██████ ██ █ ███ ██ ████ ██████████ ███ ██████ ███ ██████ ███ ███ ██████ ██ ███ ████████ ████ ████ ██ █ ████████ ██████ ██ █████ ██████ ██ ██ █████ ███████ █████████ ██ █████████ ██████ ██ ███ █████ ███ ██ ██████ █████████ ███████ ██████ ███ █████████ ██████ ███ ████ ██████ ██ ███ ███ ███ ████████
Summary
Compound television screens are built by joining together small tiles that are each a separate miniature screen.
TVs with compound screens are just a few inches thick.
When the thickness of TVs with noncompound screens is held constant, the larger a screen is, the dimmer it is.
Each tile in a compound screen is small enough to retain brightness.
In compound screens, you can have an unlimited number of tiles joined together without making the screen less bright or the TV set thicker.
Notable Valid Inferences
For TVs with compound screens, having a larger screen doesn’t mean that the screen will be dimmer. These TVs can be bright and large.
7.
Which one of the following ███ ██ ████████ ████████ ████ ███ ███████████ ██ ███ ████ ███████
a
The technology used ██ ████ ████████ ██████████ ███████ ██ ███ ███████████ ███ ██████████ ████ ████ ██████████ █████ ████████
Could be false. There is no information in the stimulus to indicate that compound screens can’t be used for TVs with small screens.
b
There is a █████ ████████ ██████ ███ ██████████ ████ ████ ███ ████ █ ███ ██████ █████ ███ ████ ████ ████ █████ ████████
Could be false. The stimulus does not mention consumer demand, so we cannot make inferences about consumer demand.
c
In a television ███ ████ █ ███████████ ███████ ███ ███████ ███ ██████████ ████ ███ ████████ ███ ███████
Could be false. The stimulus only discusses noncompound screens “in a set of this thickness.” The stimulus does not discuss how changing the thickness of the TV impacts the brightness of the screen.
d
Television sets that ███ ████ █ ███ ██████ █████ ███ ███ ██ ████ ████ ███████ ████ ███ ████ ██████ ███ ████ ██████
Must be true. TVs with compound screens are just a few inches thick, and they can have screens that are both bright and very large.
e
Television sets with ████████ ███████ ██ ███ ████ ███ █████████████ ████████ ██ ████ ████ ███████████ ████████
Could be false. This is outside of the scope of the stimulus; it could certainly be the case that there are many disadvantages of TVs with compound screens that the stimulus did not mention.