The essay is titled "Write Simply". It's about why you should try to write simply, rather than being a how-to. I think that's reasonable. It may be very difficu

The essay is titled "Write Simply". It's about why you should try to write simply, rather than being a how-to. I think that's reasonable. It may be very difficult to precisely define what "simple" means, and it may not be that necessary: it's just telling people why (he thinks) they should aim for simplicity. Most people can make a conscious choice about how simple or complex their writing is - and this essay is advice about which direction to go in.