The four sentences (labelled 1, 2, 3 and 4) below, when properly sequenced would yield a coherent paragraph. Decide on the proper sequencing of the order of the sentences and key in the sequence of the four numbers as your answer:
1. Look forward a few decades to an invention which can end the energy crisis, change the global economy and curb climate change at a stroke: commercial fusion power.
2. To gain meaningful insights, logic has to be accompanied by asking probing questions of nature through controlled tests, precise observations and clever analysis.
3. The greatest of all inventions is the über-invention that has provided the insights on which others depend: the modern scientific method.
4. This invention is inconceivable without the scientific method; it will rest on the application of a diverse range of scientific insights, such as the process transforming hydrogen into helium to release huge amounts of energy.
Correct Answer: 3214
A brief reading of the sentences suggests that the paragraph is about great inventions, focusing on the importance of scientific method and how it forms the foundation for other great inventions. 32 forms an introductory pair that claims that the modern scientific method must be the greatest of all inventions and then talks about its mode of inquiry.
1 then presents an invention that could solve many problems in the future. 4 then claims that the invention would have been impossible if the scientific method did not precede it. Hence, the coherent arrangement is 3214.
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