Elementary, my dear Watson

Although the famous British detective never said this phrase, this is what comes to mind (mine at least) when I think about speculation and deduction.

How can we make logical deductions from the evidence we have? Or even from our personal view? This is what we are going to find out these next days, and this is what I bring you so you can start revising on your own.

Modal verbs for speculation and deduction from Míriam

(By the way, the picture depicts Benedict Cumberbatch on the awesome BBC series Sherlock, which I strongly recommend!)