Gary was a man knowledgeable about basic hygiene. Because so, he was always thorough when washing his hands.

Would the above phrase "because so" be grammatically allowed?

According to the logic in my head, it should be allowed because:

A). The phrase "And so" and "And thus" are interchangeable. Therefore, "so" and "thus" can have similar meaning.

B). The phrase "Because of that" and "Because of thus" are interchangeable. Therefore, "that" and "thus" can have similar meaning.

C). If above A). and B). are true, then "that" and "so" should be interchangeable in the phrase "Because of that", resulting in "Because of so" being grammatically allowed.

D). Since "Because of so" is, for a lack of a better description, 'wordy' in the mouth especially when phrased as "and because of so", the shorter phrase "because so" should be an acceptable substitute.

At this point, I honestly can't tell if my logic is correct or if I'm doing logical gymnastics, especially when it comes to D). And so, I would really appreciate any help in figuring out if my logic is flawed or not and whether "because so" is or is not grammatically allowed.

  • 1
    Because of thus is not grammatical, and it certainly is not interchangeable with because of that. Nothing that you wrote in B) is accurate. May 12, 2020 at 17:17

1 Answer 1


I’m afraid you are doing logic gymnastics. I’ve done obscure-language-solving, and your logic would be welcome there. Unfortunately, English is rarely cut and dried. In all these cases, you’ve extrapolated from a phrase, and assumed, much like in algebra, that since a * b = 80 and a * c = 80, a = c.

Unfortunately, it is not the same with English; just because ‘and’ + ‘so’ = ‘and’ + ‘thus’, does not mean that ‘so’ = ‘thus’ in all situations; they can have very different meanings.

In particular, ‘so’ has a multitude of meanings; it can mean ‘thus’, but it can also be used to mean ‘to such a great extent’, as in

Her playing was so quick that I could barely see the movements of her fingers.

Or it can mean ‘in order to’, as in

They run as fast as they can, so that they will win.

‘Because of thus’ is not a phrase I have seen anywhere else, I’m afraid, and Google yields no real results. However, whether or not it means the same as ‘because of that’ (and I’m tempted to say that it might), does not mean that ‘that’ and ‘thus’ mean the same thing.

‘Thus’ is used to meaning ‘therefore’ or ‘as a result’, as in:

He accepted her offer, thus becoming proud owner of a stuffed porcupine.

‘That’, however, has a multitude of meanings. It can refer to a specific thing, possibly previously mentioned, as in:

That’s an excellent idea.

Or it can express a wish,

Oh, that he would come back to me.

Or it can be used to identify something:

That’s my friend over there.

And many, many, many more possible meanings besides.

Finally, to the last point — ‘because of [word]’ or ‘and because of [word]’ does not become ‘because [word]’, even if it does sound wordy. This is because ‘because of’ is one complete preposition; you need both parts in order to properly use it.

So I’m afraid you have been doing logic gymnastics. Hope this helps!

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