They can be more perfect than is convenient.
I search several dictionaries but can't find any explanation of the phrase of more perfect than is convenient How should I understand this phrase?
They can be more perfect than is convenient.
I search several dictionaries but can't find any explanation of the phrase of more perfect than is convenient How should I understand this phrase?
This is a slightly odd phrase. Rephrasing, this means there is an inconvenience because "they" are too perfect. How to interpret this phrase is going to depend heavily on the context. For example, this could imply the speaker finds someone's obsession with perfection to be somewhat annoying, and is trying to state this in a polite way.
The expression is odd, but it has no special meaning.
The structure can be explained with a different example. Suppose there is a school rule that "essays must be less than 5000 words". Longer essays are not allowed. Then if I write an essay that is 6000 words, it is too long and you can say
That essay is longer than is allowed
So in your example, if very perfect things (or people) are not convenient. And those things can be very perfect, then they can be too perfect and you could say:
They can be more perfect than is convenient.
But the idea that very perfect things are not convenient doesn't make much sense. So the sentence, is grammatically correct, but practically meaningless.