Questão jurídica principal
Whether the March 24, 2000 signed letter constituted a binding employment contract for four years.
Decisão extraída
The letter did not establish a binding employment contract; it only recorded key terms for a later, still-to-be-negotiated contract.
Fundamentação extraída
The cantonal court's interpretation and assessment of the parties' conduct were not arbitrary. The wording, the planned involvement of lawyers, and the later negotiations showed that essential points were agreed only provisionally.