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The computer keyboard is designed as Qwerty because the old typewriters used to get clogged with ink when people would type too fast, so this dude made the "qwerty" style so people would type slower by putting common letters in hard to reach places.

faulty parallelism is a construction in which two or more parts of a sentence are equivalent in meaning but not grammatically similar in form.

the correct version of this faulty parallelism in the sentence is:

the hikers knew that the hike was six miles, that it usually required the entire day, and it would not be wise to start after 10: 00 a.m.

the problem is the last sentence, the first two have a basic subject+verb+object structure.

so, to give a proper balance to the structure, or better said, to give a parallel structure, we must write a basic s+v+o structure in all three sentences:

the hikers knew that the hike was six miles, that it usually required the entire day, and it would not be wise to start after 10: 00 a.m.

sorry, i just really need points. and to this question, maybe i know the answer. but i have no time now. d