He confuses the reader with ill-defined terms and concepts.    From Wordnet, Princeton University. 

Stockholder rights remain ill-defined and the Duma has yet to adopt.    From Wordnik.com.  [The 1996 CIA Factbook] Reference

Remak's middle layer was a different thing from Pander's ill-defined.    From Wordnik.com.  [Form and Function A Contribution to the History of Animal Morphology] Reference

Future danger: To do otherwise is to run real, if ill-defined, risks.    From Wordnik.com.  [The Unending Japan Problem] Reference

Clouded: Having a pale ground, with ill-defined patches of a deeper tint.    From Wordnik.com.  [The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged.] Reference

The ground is so broken and ill-defined that it was very difficult to select.    From Wordnik.com.  [A Source Book of Australian History] Reference

Each plant consists of a mass of protoplasm surrounded by an ill-defined cell wall.    From Wordnik.com.  [A Practical Physiology] Reference

The dark green thallus has an ill-defined midrib, and is composed of parenchymatous cells.    From Wordnik.com.  [Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria"] Reference

Freedom's fate in the next century is fragile, in part because the very notion is now so ill-defined.    From Wordnik.com.  [The Future Of Freedom] Reference

For them, the risk is an identified, if ill-defined, problem known as "overtraining syndrome," or OTS.    From Wordnik.com.  [Including time for rest in a workout routine can help fitness goals] Reference

While it is dark, nothing can be seen but the abyss, or at most, a faint glimmer of ill-defined forms.    From Wordnik.com.  [Choice Specimens of American Literature, and Literary Reader Being Selections from the Chief American Writers] Reference

The process of heating to 210° with glycerin only (Hönig) yields a very impure and ill-defined product.    From Wordnik.com.  [Researches on Cellulose 1895-1900] Reference

Among the works of written speech the boundaries of art are much more ill-defined than they are elsewhere.    From Wordnik.com.  [A Librarian's Open Shelf] Reference

The plate held some kind of ill-defined chicken, some canned green beans, some "Spanish" rice and some salad.    From Wordnik.com.  [The Grief Counselor] Reference

How can irrational thinking with ill-defined words and inconsistent statements lead us to any credible knowledge?.    From Wordnik.com.  [Victor Stenger: Science Is Not Based on Faith] Reference

An ill-defined path led down the steep side of the gulch, and was lost to sight in the dense growth at the bottom.    From Wordnik.com.  [Dyke Darrel the Railroad Detective Or, The Crime of the Midnight Express] Reference

This had not been expected, and with an ill-defined feeling of dread they hurried back to the others and made their report.    From Wordnik.com.  [Derrick Sterling A Story of the Mines] Reference

Farther north, we get to that ill-defined sphere, called the sphere of influence, that extended the power of Britain in South.    From Wordnik.com.  [A Winter Tour in South Africa] Reference

Loheia, with the Red Sea on the west and an ill-defined inland border merging eastward into the desert plateau of Southern Nejd.    From Wordnik.com.  [Pan-Islam] Reference

Then, in about 1870, came the discovery of the diamond-fields, situated on the then still ill-defined western limits of the State.    From Wordnik.com.  [Origin of the Anglo-Boer War Revealed (2nd ed.) The Conspiracy of the 19th Century Unmasked] Reference

Their ship went down close to the ill-defined, maritime border between North and South Korea, and suspicion has fallen on North Korea.    From Wordnik.com.  [South Korea Buries Sailors Killed In Ship Sinking] Reference

We have marked in italics the latter part of the sentence, because it shows that the rule itself must be ill-defined or too particular.    From Wordnik.com.  [Blackwood's Edinburgh Magazine — Volume 53, No. 328, February, 1843] Reference

And she continued to walk, retaining of this ill-defined meeting an impression of coldness, of vague embarrassment, and of pain in the heart.    From Wordnik.com.  [The French Immortals Series — Complete] Reference

They assume multiple, sometimes ill-defined roles, with their jobs crossing into multiple lanes, often across one another's areas of expertise.    From Wordnik.com.  [Two of Obama's closest advisers among those likely to leave in White House shuffle] Reference

Only a moment before Gwen had felt a creepy, sickening sensation stealing over her as the result of an ill-defined and apparently causeless dread.    From Wordnik.com.  [The Darrow Enigma] Reference

"If removed on the basis of an appearance of impropriety, the Senate would set a dangerously low and ill-defined standard for future impeachments.".    From Wordnik.com.  [Impeachment trial starts for New Orleans federal judge accused of corruption] Reference

So my weapons are at the service of those who intrench themselves behind the impregnable rampart of duty ill-defined, complicated or contradictory.    From Wordnik.com.  [The Simple Life] Reference

He would not want to be anywhere else, yet his duties are ill-defined and apparently consist mainly of offering encouragement to the younger players at Melwood.    From Wordnik.com.  [The unpaid Trinidadian World Cup players are a scandal for Fifa] Reference

 She said nothing to him about it as he drove her home, promising that he would contact her as soon as he returned from some ill-defined camp or family vacation.    From Wordnik.com.  [The Messenger] Reference

The ill-defined distribution of authority between the EPA and CEQ has led to tensions with the White House in the past, and that's understandable — up to a point.    From Wordnik.com.  [Cabinet Makers] Reference

This remarkable logic has been criticised by health campaigners, who say that obesity is a recognised medical condition, while fat is a pejorative and ill-defined term.    From Wordnik.com.  [Iran wants to dazzle London, but will Prince Charles give his consent?] Reference

It is extremely faint and ill-defined, at least in this climate, though better seen in tropical regions, but cannot be mistaken for any atmospheric meteor or aurora borealis.    From Wordnik.com.  [Aether and Gravitation] Reference

The whole figure, in like manner, assumed a show of life such as we impart to ill-defined shapes among the clouds and half deceive ourselves with the pastime of our own fancy.    From Wordnik.com.  [Short Stories of Various Types] Reference

The whole figure, in like manner, assumed a show of life, such as we impart to ill-defined shapes among the clouds, and half-deceive ourselves with the pastime of our own fancy.    From Wordnik.com.  [The International Monthly Magazine - Volume V - No II] Reference

The fate of the sterling America's Cup, trophy of the world's most famous yachting competition, had been reduced to a debate over ill-defined rule books and hoary royal charters.    From Wordnik.com.  [A Duel In The Sun] Reference