If you have read the "Random Ramblings" chapter in my book M Square of a V Square, you already know what you are in for. My mind has a peculiar habit. It starts with one subject, takes a right turn into another, makes an unexpected U-turn, wanders into a third, and finally arrives somewhere I never intended to go. Surprisingly, most of the time I manage to return safely! For quite some time, I was wondering whether these wandering thoughts should become another book. Then my grandson, Eshwar, came to my rescue. Instead of saying, "Thatha, write another book," he quietly created a website for me—drbalasubramanianwrites.in. That solved my problem beautifully. Why imprison my thoughts inside a book when they can roam freely as blogs? So, "This & That" was born. The title explains everything. There is no timetable, no syllabus, no examination and certainly no guarantee about what will appear next! A WhatsApp message may inspire one article, a childhood mem...