And your measurement devices can error or be configured improperly.
Seriously some large % of "breakthrough" results are just errors in methodology/measurement. It's why no one serious gives a damn about results until they're replicated(or at least they shouldn't). And that's before you get into outright fraud where they just claim they measured something.
Extraordinary claims require extraordinary evidence. If you claim you've gotten that kind of fusion reaction, and can't reproduce it, then it casts doubt on if you ever really got that reaction at all.
Seriously some large % of "breakthrough" results are just errors in methodology/measurement. It's why no one serious gives a damn about results until they're replicated(or at least they shouldn't). And that's before you get into outright fraud where they just claim they measured something.
Extraordinary claims require extraordinary evidence. If you claim you've gotten that kind of fusion reaction, and can't reproduce it, then it casts doubt on if you ever really got that reaction at all.