Created SC2334 (markdown)

SC2334.md

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+## You probably wanted || here, otherwise it's always false.
+
+### Problematic code:
+
+```sh
+if (( ret == 137 && ret == 143 ))
+then
+  echo "Process killed by SIGTERM/SIGKILL"
+fi
+```
+
+### Correct code:
+
+```sh
+if (( ret == 137 || ret == 143 ))
+then
+  echo "Process killed by SIGTERM/SIGKILL"
+fi
+```
+### Rationale:
+
+The problematic condition will never trigger because of a logic error.
+
+In English one think say "I want to check for the numbers `137` and `143`", but the test ends up checking that the number is both `137` and `143` at the same time, which it can't be (if the number is 137, it necessarily won't be 143, and vice versa).
+
+The correct check is "if the number is `137` or if the number is `143`", which will be true if the value is either 137 or 143.
+
+### Exceptions:
+
+None
+
+### Related resources:
+
+* Help by adding links to BashFAQ, StackOverflow, man pages, POSIX, etc!