I have not been to California till yet.
That thought is expressed a little differently -- certainly not with till yet.

Here's how you do it: I have not been to California so far. Or just yet by itself: I have not been to California yet.

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Do you mean that both till and yet could be used in the same sentence?
I don't believe I said anything that should lead you to that conclusion.

The combination till yet makes no sense. You should not use that combination.

That is not the same as not using till and yet in the same sentence. For example, I can write this:

John has not come home yet, and he won't be home till 3 o'clock.

This usage has nothing to do with the usage you showed in the California example.

CalifJim, please have a look on this post .
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