He placed it in this corner and found it in another corner; this is a dispute between רשב"ג and the רבנן, etc. - הניח בזוית זו ומצא בזוית אחרת פלוגתא דרבן שמעון בן גמליאל ורבנן
Summary:
The רבנן (who argue with רשב"ג) maintain that the whole house must be searched, for we are concerned that mice removed the original חמץ and the new חמץ is different (for these רבנן agree with רשב"ג that הוא שמצא לא הוא שאבד); alternately we do not know the initial amount of loaves set aside.
For I assume that a person who is טמא entered there - שאני אומר אדם טמא נכנס לשם
Summary:
The concern of an אדם טמא is only by ספק כלים but not by ספק אוכלים. Alternately there is no concern if there is any indication that it was done by an אדם טהור.
Because it is the way of a child to crumble bread - מפני שדרכו של תינוק לפרר
Summary:
The rule of תינוק שנכנס is only if the crumbs account for the entire ככר. This rule applies even according to רשב"ג, for the child was immediately followed inside, therefore it is assumable that the crumbs are from the ככר.
The רבנן did not trouble him to spend his money - בממוניה לא אטרחוהו רבנן
Summary:
A person definitely is pleased (and required) to spend money for a מצוה which he is required to perform, however where there is uncertainty, if the performance of the מצוה is necessary one may not be obligated to spend money.
And if he did not search within the time - ואם לא בדק בתוך המועד
Summary:
רש"י maintains that בתוך המועד means שעה ששית (and אחר המועד means from חצות until nightfall of פסח) while תוספות maintains that בתוך המועד refers to the time from חצות until the conclusion of פסח and אחר המועד means after the conclusion of פסח; one has to be בודק even after פסח in order not to eat the חמץ שעבר עליו הפסח.
