In order to avoid the leakage of trade secrets, the company will sign a labor agreement with the core technology employees, stipulating that employees must not engage in similar technical positions in other enterprises within three years after leaving the company. It is foreseeable that core technology employees only Can continue to work in a business. What are the necessary prerequisites to make the above inferences? ['The company will not give financial compensation to core technical employees who cannot work due to the agreement after leaving the company.', 'In addition to similar technical positions, core technical employees cannot obtain job opportunities in other positions.', 'Under the same conditions, core technical employees tend to choose a familiar working environment.', 'All core technical employees are willing to enter into such agreements with enterprises.']