tax cuts

[Leslilake1 at aol.com]

Twice today on NPR I've heard someone (two different someones, I think) 
coming on to say that:
1.  When taxes were cut under Reagan, tax revenues increased
2.  In every case where taxes were cut, revenues increased

It seems to me that these statements can't be true (unless the numbers are 
jiggered somehow).  Are they?

Leslie