How to solve the Nov. 29 cryptoquote in the Wisconsin State Journal?

apparently the tag is a tag synonym for so I guess that's what I'm using

So recently I have been trying to get back into solving the cryptoquotes because I used to enjoy doing them. This is the cryptoquote for today in the Wisconsin State Journal, which I'm struggling to solve:

GAED CXH'L YGDUD QAP'UD
TUAE; CL'X YGDUD QAP TCHS
NCMGL YGDH KNN MUAYX
SKUR. - VCDUFD OUAYH


Here's my attempt at solving this:

Right away I assumed CXH'L=ISN'T, meaning that we can rewrite this with

     ISN'T
GAED CXH'L YGDUD QAP'UD

IT'S            I
TUAE; CL'X YGDUD QAP TCHS

I  T              S
NCMGL YGDH KNN MUAYX

I
SKUR - VCDUFD OUAYH


Now I felt like it would be reasonable to assume that QAP'UD=YOU'RE, mainly since you're is the only word that I could think of that had two letters after an apostrophe, so now it is

 O E ISN'T   E E YOU'RE
GAED CXH'L YGDUD QAP'UD

RO   IT'S   ERE YOU  I
TUAE; CL'X YGDUD QAP TCHS

I  T   EN      RO S
NCMGL YGDH KNN MUAYX

R     IER E  RO
SKUR - VCDUFD OUAYH


Now I can make out the first name PIERCE (V=P and F=C) and this is my current progress and where I'm stuck:

 O E ISN'T   E E YOU'RE
GAED CXH'L YGDUD QAP'UD

RO   IT'S   ERE YOU  I
TUAE; CL'X YGDUD QAP TCHS

I  T   EN      RO S
NCMGL YGDH KNN MUAYX

R    PIERCE  RO
SKUR - VCDUFD OUAYH


So my question is: Is there anything I could do from here, or have I assumed anything incorrectly so that I'll now have to restart?

There are two very likely options for the word ..ERE and either one will give you the plain letter for cipher G.
• oh okay, but there's only one good one, right? I guess "there" is possible, but I feel like "where" would be better because we have then HO.E ISN'T WHERE YOU'RE which I feel like would make more sense. Edit: Don't we still have a problem with KNN then? That's the only word that uses K or N. Nov 30, 2023 at 2:09
• You already assumed cipher H, but it looks like you missed a few places where it appears. Nov 30, 2023 at 2:18
• Cipher K and cipher N each appear in two words. Nov 30, 2023 at 2:20