The phrase "rather incomprehensible" is grammatically correct and can be used in written English.
It is typically used to describe something that is difficult to understand or make sense of. Example: The instructions for assembling this bookshelf are rather incomprehensible, I'm not sure I'll be able to put it together correctly.
She sank deeper into rather incomprehensible paintings and drawings".
It is rather incomprehensible why the European court of justice would seek to put Europe at such a disadvantage".
If you think that seems like a rather incomprehensible and misguided evaluation process, you'd probably be right, which is why the REF has received so much flak.
The whole section on sub-additive effects is rather incomprehensible and showed be re-written in a more clear way.
Or rather unseriously incomprehensible.
Some success is patchy; the first villagers are blogging, but the immediate concern is for pencils for the school rather than this incomprehensible notion of the worldwide web.
Based on his counseling experiences, he says that kids need more flexibility rather than an incomprehensible rigidity that even parents seem unable to back up.
The report recommends that companies adopt simpler, more transparent and streamlined ways of presenting consumers with their options rather than the "long, incomprehensible privacy policies that consumers typically do not read, let alone understand".
Ryan's idée fixe is that taxes may be cut without consequences, and that giving tax credits to Americans who don't earn enough to benefit from them is a path to better health care rather than a cruel, and incomprehensible, attempt to obliterate it.
Twelve months ago we all approached the Nice event as an important and defining moment and we felt disappointed when it produced something which resulted in more complexity rather than less, was more incomprehensible to the public rather than less, and seemed to reflect more a sense of deal-making than a sense of ideals behind the European process.
So when Hensher dismisses the Christian beliefs of a nurse he meets, I'm left questioning whether his exploration of Saint Perpetua's faith isn't incomprehensible after all, but rather the fictional expression of his own feelings about Christianity.
