Help with understanding the following sentence: 考えても見るがいい

Question

So, again, the sentence is

考えても見るがいい

and the provided English is

Just think about it.

(context)

I don't understand quite anything about the sentence. I know of the てみる structure but I don't really think it is related. If it was just 「考えてもいい」 it would make sense, even though the English version is (I think) more "assertive".

Edit:

It turns out that the use of verb + がいい is a form of commanding or invitation, as was suggested in the comments, and explained at The meaning of ～がいい

With this in mind, I found a discussion about what I think is an equivalent expression on yahoo:

考えてもみてほしい

Here the answer describes the meaning of the phrase as follows:

考えてもみてほしいは、考えるということを有意義、有意味なこととして希望、推奨している表現です。

So I think I understand that this is an invitation to think about something, with the implied nuance that doing so may prove to be beneficial/useful, but I still don't understand how this stems from the usage of 〜ても〜

Answer 1

So you already understand 考えてみるがいい is a way to say "Try thinking!" This attributive-form + がいい is a pompous, arrogant and old-fashioned way of making an imperative, and you would hear this said by an emperor, a prophet, a dragon and such (in fiction).

• <動詞の辞書形>　+　がよい ―　How is this allowed?
• Plain Verb followed by がよい

Next, what's the difference between these two?

• 考えてみるがいい (or 考えてみろ / 考えてみなさい / etc)
• 考えてもみるがいい (or 考えてもみろ / 考えてもみなさい / etc)

The role of this も is hard to explain, but I can at least say this has nothing to do with ても meaning "even though" as in 走っても間に合わない. Instead, this も is here to add a certain type of exclamatory feeling... something along the lines of "I'm serious", "come on", "at least in this case" or "already (as in 'stop it already')". I believe this is a type of exclamatory-も:

• Odd use of も has me stumped 「ソウルにいるのも今夜きりです」
• What is an emphatic particle?
• Usage of も in そんなこともないけど

Practically speaking, I think you can regard te-form + も + みろ/みなさい/etc as a set phrase.