The phrase "acknowledge that since" is correct and usable in written English.
It can be used when introducing a statement that recognizes a condition or fact that has been established or has occurred over a period of time.
Example: "I acknowledge that since the implementation of the new policy, productivity has increased significantly."
Alternatives: "recognize that because" or "accept that given that".
Instead, let's acknowledge that since the September 11 attacks, it has become a feature of governments to repeatedly accumulate more power in times of crisis.
Hare acknowledge that since archangels (e.g., Lucifer) are not reliably impartial in this way, it is really God who is the model.
Even the most strident critics of CEO pay acknowledge that since the early 1990s boards have become far more independent, more vocal and otherwise less willing to tolerate an imperial CEO.
Though Jarry tried to work with gay male creators as much as possible, they wanted to acknowledge that since the beginning, numerous contributions were made by non gay-male identifying artists to the magazine, too.
Researchers acknowledge that since there haven't been any clinical trials and only qualitative studies on the connection between ayahuasca and eating disorders, we are very much in the preliminary stage of unraveling the psychedelic brew's healing potential.
However, we acknowledge that since the candidate SNP genotyping study is not independent of the GWAS, the P-value distributions will be biased and therefore our study cannot be regarded as a standard "2-stage" analysis.
Longtime intra-fandom journalist (and fursuiting husky dog) Patch O'Furr refers to them as "the theatrical soul of furry," acknowledging that, since the mid-2000s, thavehave become "the furry thing".
Longtime intra-fandom journalist (and fursuiting husky dog) Patch O'Furr refers to them as "the theatrical soul of furry," acknowledging that, since the mid-2000s, thavehave become "the furry thing". Yet while most now recognize furries by these suits, few outside the scene think about where said suits come from.
Human Rights Watch said that about 140 were killed in political violence between November and April 17, the day after the election, while acknowledging that many more had died since.
