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Reply to "Its surveillance apparatus is (mostly) in order to monitor"

(1) Its surveillance apparatus is (mostly) to monitor budget deficits in real time, but it could also help to evaluate the future consequences of policy decisions. (with or without "mostly")

(2) This money was (mostly) to tackle youth unemployment. (with or without "mostly")

3) The aim of this paper is to clarify the fact that uniform asymptotic stability is equivalent to exponential stability for the half-linear differential system.

4) The purpose of this contribution is to clarify the fact that such algorithms need proper calculation of the update direction in undermodeled situations.

Q: Do you consider the above sentences correct as they stand?

Yes, I do.

If so, how do you understand the "to-infinitivals"? Do you understand them as "infinitival noun clauses", as in: To live is to suffer? Or do you understand them as sort of elliptical constructions, having missing phrases like, "be intended to", or "be designed to" etc., as you suggested in your first post?

I find (1) and (2) to be different from (3) and (4).

I understand the infinitival in (1) and (2) to be one of purpose, similar to "for" + V-ing. Syntactically, it's a subject complement of adjectival value:

1.e. Its surveillance apparatus is (mostly) for monitoring budget deficits in real time, but it could also help to evaluate the future consequences of policy decisions. (with or without "mostly")

2.e. This money was (mostly) for tackling youth unemployment. (with or without "mostly")

Instead, the infinitival has nominal value in (3) and (4). Notice that, though a bit awkward, you can use the infinitival as subject:

3.a. To clarify the fact that uniform asymptotic stability is equivalent to exponential stability for the half-linear differential system is the aim of this paper.

4.a. To clarify the fact that such algorithms need proper calculation of the update direction in undermodeled situations is the purpose of this contribution.

Last edited by Gustavo, Co-Moderator
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