Very quickly review the גמרא דף יז. “אמר רב גידל (second line from top of the Amud) until איתמר (eleven lines from the top of the Amud)
Note the change of Girsa in the Gemara by the הגהות גר”א
What is the difference in understanding of the Gemara?
Halachik Conclusion:
Learn שולחן ארוך ס’ ש”ס סע’ א and משנה ברורה
https://hebrewbooks.org/pdfpager.aspx?req=60389&st=&pgnum=46
https://hebrewbooks.org/pdfpager.aspx?req=60389&st=&pgnum=47
Learn the גמרא דף יז. “איתמר (eleven lines from the top of the Amud) until the Mishna
Question:
By which instances do we apply the concept of הואיל והותרה and where does it not apply?