I would not say that this person replaced “and” by “or”. I guess they considered the statement “Lisa is a bank teller and a feminist” to be “50%” true if Lisa turns out to be a feminist but not a bank teller.
The formula used would be something like P(AB)=1/2*(P(A)+P(B))
I would not say that this person replaced “and” by “or”.
I guess they considered the statement “Lisa is a bank teller and a feminist” to be “50%” true if Lisa turns out to be a feminist but not a bank teller.
The formula used would be something like P(AB)=1/2*(P(A)+P(B))