Hamlet's Revenge?

[LWilbanks]

What reason does Hamlet give for being so cautious in taking revenge and so thorough in his search for evidence? Is his reason convincing?

[Calidore]

Best place to look for the answer to the first question is in the play itself:

http://www.shakespeare-online.com/plays/hamletscenes.html

Or you can watch a performance. Here's the recent production starring David Tennant and Patrick Stewart on YouTube:

https://www.youtube.com/playlist?list=PL8653490E2C680C5C

The second question is asking your opinion. Do you find his reason(s) as given to be convincing and why?