Could you link to someone somewhere saying so ?
Never ever have i seen /heard any scientist allow for even suggestion of the idea that FTL might be possible.
Academic scientist seem religiously prejudiced against the idea of FTL.
Only thing ever, is the assertion that the universe expands faster than light because the space in it also expands, and therefor to the left and right of us 0.6 c +0.6 c =1.2 c could be true.
Other than that, only Eric Dollard ever demonstrated a radio signal , not an electromagnetic sinewave signal, but a dielectric pulsetrain of n pulses-per-meter (thus skipping space beteen pulses) to be able to exceed lightspeed, and he's not an 'acknowledged' or 'recognised' scientist.