It is true we usually scan email messages rather than read them.
This is no excuse, however, for overlooking the most important question asked within a business inquiry.
How much time is wasted repeating a question via email - I asked the question in the first email, my contact replied to my email without answering the question I asked. So I need to reply again with the same question.
This is a business etiquette issue because it wastes the time and patience of your professional contacts.
Be reminded: Scan the ENTIRE email before replying.