Can one co-excutor make unilateral decisions without the others knowledge or consent?

No, one co-executor generally cannot make unilateral decisions without the knowledge or consent of the other co-executor(s). Executors are expected to act in the best interests of the estate and work collaboratively, as they share fiduciary duties. If one executor makes a decision without consulting the others, it can lead to disputes and potential legal consequences. It's advisable for co-executors to communicate and agree on significant decisions regarding the estate.