I was just having a conversation with a friend and I said "see how far from the access point each device is, so that I can do some relocation and such forth".
She said that using such forth at that part of the sentence is incorrect. Why?
Learn English – When should “such forth” be used
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Related Solutions
In psychology, these are known as intrusive thoughts(1). The term is chosen because these thoughts seem to enter your mind from outside, without your control. Intrusive thoughts can occur across a wide spectrum of subjects, from uncontrollable fears, to the urges toward mischief or violence which you experience, to the urge to harm oneself without reason, to suicidal ideation. When these thoughts occur with such frequency or intensity that they interfere with a person's life, they're often considered a symptom of obsessive-compulsive disorder. In most cases, though, a moderate amount of intrusive thoughts is not considered symptomatic.
Catch-22
To use it in a sentence, "It's a catch-22" or "It's a catch-22 situation"
From Google's definition of Catch-22:
a dilemma or difficult circumstance from which there is no escape because of mutually conflicting or dependent conditions. "a catch-22 situation"
(Paraphrased very slightly) from Wikipedia's Catch-22 (logic):
A catch-22 is a paradoxical situation from which an individual cannot escape because of contradictory rules.
An example would be:It's a catch-22 situation: To apply for a job, you need to have a few years of experience. But in order to gain experience, you need to get a job first.
Origin is from the book, Catch-22 by Joseph Heller.
From the Wikipedia page for Catch-22 (book):
The phrase "Catch-22" has since entered the English language, referring to a type of unsolvable logic puzzle sometimes called a double bind.
From the Wikipedia page for Double Bind:
A double bind is an emotionally distressing dilemma in communication in which an individual (or group) receives two or more conflicting messages, and one message negates the other. This creates a situation in which a successful response to one message results in a failed response to the other (and vice versa), so that the person will automatically be wrong regardless of response. The double bind occurs when the person cannot confront the inherent dilemma, and therefore can neither resolve it nor opt out of the situation.
Best Answer
The idiomatic phrase is "and so forth" which is often also used as a part of the phrase "and so on and so forth". It is, IMO, an elided form of "(and so it goes on) and so it goes forth".
While "and such forth" appears to be reasonably commonly used (going by Google's results), this ngram suggests that it is at best a colloquialism or a dialectal peculiarity and at worst, a common error.
To answer the question in the title, I'd say that and such forth should never be used. The phrase and so forth should be preferred instead.