Self-study
If you have no keyboarding skills at all, you will not be able to use a computer. ███ ██ ███ ███ ███ ████ ██ ███ █ █████████ ███ ████ ███ ██ ████ ██ █████ ████ ██████ █████ █ ████ ██████████ ████████
Summary
If you have no keyboarding skills, then you can’t use a computer.
If you can’t use a computer, then you can’t write essays using a word processor.
Notable Valid Inferences
If you have no keyboarding skills, then you can’t write essays using a word processor.
7.
If the statements above are █████ █████ ███ ██ ███ █████████ ████ ██ █████
a
If you have ████ ███████████ ███████ ███ ████ ██ ████ ██ █████ ████ ██████ █████ █ ████ ██████████ ████████
Could be false. This confuses sufficient and necessary conditions and is just the contrapositive of (B). Having keyboarding skills is necessary, not sufficient, for writing essays using a word processor.It’s possible to have keyboarding skills and yet still not be able to write essays in a word processor.
b
If you are ███ ████ ██ █████ ████ ██████ █████ █ ████ ██████████ ████████ ███ ████ ██ ███████████ ███████
Could be false. This confuses sufficient and necessary conditions and is just the contrapositive of (A). Being unable to write essays using a word processor isn’t a sufficient condition for anything. Someone can be unable to write essays using a word processor even while having great keyboarding skills.
c
If you are ████ ██ █████ ████ ██████ █████ █ ████ ██████████ ████████ ███ ████ ██ █████ ████ ███████████ ███████
Must be true. This is the contrapositive of the conditional chain in the stimulus.
d
If you are ████ ██ ███ █ █████████ ███ ████ ████████ ██ ████ ██ █████ ████ ██████ █████ █ ████ ██████████ ████████
Could be false. If you can use a computer, all we can infer is that you have at least some keyboarding skills.
e
If you are ███ ████ ██ █████ ████ ██████ █████ █ ████ ██████████ ████████ ███ ███ ███ ████ ██ ███ █ █████████
Could be false. This confuses sufficient and necessary conditions. Being unable to write essays using a word processor isn’t a sufficient condition for anything. Someone can be unable to write essays using a word processor even while being able to use a computer.