Consensus can get delayed and be attacked as a way to reach decisions.Since the process will always be slower that any alternative, for instance in a vote for majority, opposing positions are generally discarded.By eroding the use of the word the final objective is only to keep the appearance of consensus but in reality another process is used.
The problem with the word consensus has been discussed several times before on Wikibooks.
The good aspect of Wikibooks not being a democracy is that it it would turn Wikibooks into a project dominated by the active and powerful, being them an active minority or a voting majority since participation is voluntary, and only a fraction of all registered users are active at a given time, due to this facts, the best procedure for closing decisions should be based on the quality of arguments resulting in no active opposition.
People are not pressuring, they are attempting to be understood and understand each-others positions.
To formulate an opinion everyone requires a reason, an augmentation that they can understand. In a process where ones view is a minority there are tree routes: Stating that one is being pressed is a evasion, since in our project no-one has any power over the other, the value is on the arguments.
There are many ways consensus decision-making may be applied it can even have different guidelines and frameworks (see Wikipedia article on Consensus relating to decision-making), due to historical reasons and from the text of the approved policy that defines it, the Consensus decision-making on Wikibooks is a process that not only seeks the agreement of most participants, but also try to resolve or mitigate the objections of the minority to achieve the most agreeable decision by compromise, even if the policy text gives an escape route that can cause confusion and is at times contradictory, the process has (as I will demonstrate) reasons to be strictly followed and restarted if consensus cannot be reached.
Any deviation or objection that prevents the reaching of consensus can only have two outcomes, a block or a breaking of the consensus process that will result in majority rule voting (the first can be resolved with dialog and is fostered by the Wikibook project, the last should be highly contested as it results in an illegitimate decision on the eyes of the community, unless the core rules are changed or state an exception that in itself was agreed by consensus that the opposition can be dismissed if the majority doesn't feel the opposing point as well defined or argued for, this view has somewhat redefined consensus on Wikibooks and the pure form has been re-branded "strict" consensus, not to be confused with unanimous consent).
Take for example the use of consensus in this new world of sharing, equality and participation, words are used not to express facts but to sweeten or to soften otherwise more hash or compromising phrases, that was mostly known as twisting the words in the past and now is more to be politically correct or to give a spin on the subject, for example take the flowing "some areas are becoming consensual among most writers" (is a contradiction of terms, I can only see this as an attempt to be obtuse since it transmits an idea of general agreement, and impart a wrong conclusion, an exact variation but not so pleasant would be "some writes are starting to agree in some areas", but this will give emphasis to the split that exists).
Recently (in terms of the time the word is used), IETF coined the term "rough consensus", it is an erosion of the word to permit a politically correct way to impart the "sense of the group" on the "dominant view", the terms is yet to be adopted into general use, the results of this type of erosion gives place to the appearance to sub/supra definitions like "genuine consensus" or "strict consensus" as a way to show a difference to the various interpretations, basically there is only a form of consensus that can exist and function from discussions from 1 to 1 to other more complex implementations (a French philosopher postulated that a limit exist, he stipulated that to be the size of a city's population, but with technology and the evolution of city sizes things have indeed changed, so who can say until it is tried), any attempt to give a level to the word can't work as the meaning is absolute, participation of all on a common accepted solution, restrictions or instructions on how we make that happen are "not included", it originally was meant to be used by people with good intentions.
An essay in userspace need only represent that user's stance on the topic.
General decisions and global policies on Wikibooks can only be decided by the community in a specific and recognized way that is by "Community consensus", this requires only that no state of objection is expressed, it supports abstention and may include comments by users that may even chose not to express their agreement or disagreement with a specific proposal that is put forward for community discussion and approval, with some punctual exception that are illustrated below.