Statements like 'the higher', 'the more', etc.

[Harry_Ph]

Which is the most formal construction (and the best one that should be used in formal writing)?

1) The higher the I.Q., the more intelligent the person.
2) The higher the I.Q. is, the more intelligent the person becomes.
3) The higher the I.Q., the more intelligent the person becomes.
4) The higher the I.Q. is, the more intelligent the person.
_________________
The more we learn, the less we seem to know.

[Mister Micawber]

.
1) The higher the I.Q., the more intelligent the person.

'Become' is the wrong verb.
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Native English teacher at Mister Micawber's

[Harry_Ph]

I see. But what can you say about the following:

1) The higher the I.Q. is, the more intelligent the person is.
2) The higher the I.Q., the more intelligent the person is.
3) The higher the I.Q. is, the more intelligent the person.

Are they acceptable?
_________________
The more we learn, the less we seem to know.

[Mister Micawber]

.
They are less elegant.
.
_________________
Native English teacher at Mister Micawber's

[Harry_Ph]

Thank you once again, Mr. Micawber.
_________________
The more we learn, the less we seem to know.