<p class="MsoNormal" style="text-align: left; line-height: normal; margin: 0in -26.2pt 10pt 0in;" align="left"><span style="color: black; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-fareast-language: EN-GB;" lang="EN-GB"><span style="font-size: small;"><span style="font-family: Times New Roman;">There has been a lot of discussion by the Poskim on the question of when one can only fast either on Tsom Gedaliah or on Yom Kippur. However I have always thought that this discussion is theoretical. Surely a person who for medical reasons would not be able to fast on Yom Kippur if he fasted a week earlier (or in some years six days), would be forbidden to fast on any fast day.</span></span></span></p>