Intersect tool missing I have been trying to use the intersect tool, but unexplainably it is not evident on my menu. 

 

As can been seen in the screen print, the Intersect tool is nowhere to be found. Another user thought that it might be due to me using an old version of Blender - that was my initial thought, but I have since installed 2.78 and the Intersect tool is still in hiding. 

Is it possible that I somehow turned it off or hid it im my User Preferences? 

Any ideas? Help.
The screen grab on the question shows a project open on v 1.72



Boolean tools in edit mode were introduced in version 2.77.

Update to a newer version of Blender