[If he said:] “On condition that I have a beis kor of land,” she is betrothed [provided] he has [it]. “On condition that I have [it] in a specific place” —- if he has [it] in that place, she is betrothed; if not, she is not betrothed. “On condition that I will show you a beis kor of land” —- she is betrothed [provided] he will show [it to] her. If he showed [it to] her in a valley, she is not betrothed.