Here is another possible explanation.

According to the Myers Briggs letters of each type (INTP, ENTP, etc.), under stress...



...An ENFP would behave like an ISTJ.

An INFP would behave like an ESTJ.

An ENFJ would behave like an ISTP.

An INFJ would behave like an ESTP.



An INTP would behave like an ESFJ

An ENTP would behave like an ISFJ

An INTJ would behave like an ESFP

An ENTJ would behave like an ISFP



An ISTP would behave like an ENFJ

An ESTP would behave like an INFJ

An ESFP would behave like an INTJ

An ISFP would behave like an ENTJ



An ESFJ would behave like an INTP

An ISFJ would behave like an ENTP

An ESTJ would behave like an INFP

An ISTJ would behave like an ENFP.



The thing is, for each case it would be a bad parody of the respective type. They'd carry on like gross fun-house mirror reflections of themselves because the cognitive functions would be essentially reversed