Using multiple conditions for the same variable in `python`

I have data that looks like the following (4-columns and tab-separated):

AAA 123 null    0
AAA 124 null    1
BBB 234 null    0
CCC 235 negative    -2
CCC 345 negative    2
DDD 346 null    -1
EEE 456 positive    4
EEE 457 positive    0

Using this data, I need to write a conditional statement where if the two conditions in Cols 3 and 4 are met, the word "TRUE" is printed in a 5th column, or if not, the word "FALSE" is printed.

Trying to nest "IF" statements using python, I have written the following code:

with open('infile.input', "r") as opened_file:
    for gLine in opened_file:
        print gLine
        oneID, twoID, oneScore, twoScore = gLine.split()
        if oneScore == "positive" and twoScore > 0:
            if oneScore == "null" and twoScore == 0:
                if oneScore == "neutral" and twoScore == 0:
                    if oneScore == "negative" and twoScore < 0:
                        print bookID, ID, oneScore, twoScore, "TRUE"
        else:
            print oneID, twoID, oneScore, twoScore, "FALSE"

The result of this code is that "FALSE" is assigned to all of the lines, as follows:

AAA 123 null    0   FALSE
AAA 124 null    1   FALSE
BBB 234 null    0   FALSE
CCC 235 negative    -2  FALSE
CCC 345 negative    2   FALSE
DDD 346 null    -1  FALSE
EEE 456 positive    4   FALSE
EEE 457 positive    0   FALSE

. I have looked here and here for advice to solve the problem, and the code works with just one condition (for instance marking all of the 'positive' and 'x>0' correctly as TRUE). When I add more than one condition it fails to achieve my desired result, which is as follows:

AAA 123 null    0   TRUE
AAA 124 null    1   FALSE
BBB 234 null    0   TRUE
CCC 235 negative    -2  TRUE
CCC 345 negative    2   FALSE
DDD 346 null    -1  FALSE
EEE 456 positive    4   TRUE
EEE 457 positive    0   FALSE