Okay, folks, I’m telling you this because of my love for all mankind.
The phrase is for all intents and purposes.
I saw “for all intensive purposes” in an e-mail from a gentleman who was attempting to describe his education. Let me tell, nothing cuts the legs out from under a list of degrees quite like a boner of a mistake like that.
This is mistake that really makes you look bad. The phrase is easy enough to mishear, but no matter how fast you’re reading, “all intents and purposes” just doesn’t look like “all intensive purposes,” so making this mistake seems to imply that a) you don’t read much, b) you don’t read carefully, c) you really need to improve the caliber of your reading material, or d) all of the above.
When I make a mistake, I really want someone point it out to me (gently, preferably), but I would have sounded like a total tool if I’d responded to this e-mail with a grammar critique, so I’m going to just try to spread the love around a little.
INTENTS AND purposes. Learn it, live it, love it.