Is father alive? He answered him, father is alive. Is mother alive? He answered him, mother is alive - אבא קיים אמר ליה אבא קיים אימא קיימא אמר ליה אימא קיימא
Summary:
The ר"ח maintains that when ר"ח asked אבא קיים, so רב responded אבא קיים referring to the father of רב. However according to our text when ר"ח asked אבא קיים the response from רב was אימא קיימת in order not to confuse ר"ח into thinking that he means ר"א מכפרי (since people call their grandfather, father).
As it is written; and אברהם arose early in the morning - שנאמר וישכם אברהם בבקר
Summary:
We derive the rule of ת"ח לא יצא יחידי בלילה from the story of סדום. We derive the rule of ואין מקדימין טפי מצפרא from the story of the עקידה where there is no concern of לא יצא יחידי בלילה (for he was a שליח מצוה and traveled with שני נעריו).
Is it the responsibility of the landlord to search, for it is his Chomeitz - על המשכיר לבדוק דחמירא דידיה הוא
Summary:
The fact that it is חמירא דידיה at the onset of חיוב בדיקה should require the משכיר to be בודק even if he rented it out later. There can be no חיוב מזוזה for merely owning a house (without living in it); there can be a חיוב בדיקה even if one does not live in the house (on פסח).
Summary:
The possessor of the key at the time כשחל חיוב הבדיקה (when he owns [the house] or wants to rent it) is responsible for the בדיקה, for the other party has no access to be בודק.
