The other morning we discussed right usage of "therefore" and "hence.In . Today we will distinguish between "therefore" and "therefor."

Therefor = for your, in return for that, for that purpose (often utilized in legal-speak)
Therefore = consequently, for that reason, because of that, to that end

Examples:
The audio will discuss your blowout and the will cause therefor.
The speaker can provide the laptop and all of the paraphernalia consequently.
The speaker had a year-end, therefore he won't be able to speak to us currently.

There are several words including therefor that have precisely the same legalistic or archaic firmness:
. . . . Thereafter = immediately after that
. . . . Thereby = with that means
. . . . Thereat = at that place
. . . . Therefrom = from that
. . . . Therein Equals in there, in that respect
. . . . Thereof = of that, from that will cause
. . . . Thereon = on that
. . . . Thereto Equals to that
. . . . Therewith = with that

My dictionary says that most of these words had been in use before the Twelfth century,
and many are considered archaic today. I would personally avoid using them in case you are
striving for clarity, for example in communications with management or stockholders.
However, they are utilized all you want if your target is obfuscation (take note,
you law firms and IRS teaching writers out there.)

My private favorite of these is "thereby."
Example:
Spam filter systems remove email pieces of lesser importance, therefore increasing
productivity.

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Business Quote of the Day:

A business of high basic principle attracts high-caliber people more readily,
thereby gaining a basic cut-throat and profit advantage.

- Marvin Bower, late CEO of McKinsey & Company